{"items":[{"id":"NVI-00010708","kind":"vulnerability","title":"ammonia: mXSS  via MathML `annotation-xml` encoding strip","revision":3,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected.","NVD lastModified does not establish freshness of every associated CPE record."],"lifecycle":"active","identifiers":["GHSA-9jh8-v38h-cvhr","CVE-2026-63430"],"plain_summary":"GitHub lists this reviewed advisory for ammonia, ammonia, ammonia. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-157e7128c848cada057bd0cc58f99bd4"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-10-16T16:00:33.533Z","value":"6.3 MEDIUM (4.0)","meaning":"security-advisories@github.com severity; no combined Null risk score.","source_id":"sr-14d2a4ac4bb6bb8e1168598e2ef34920"},{"kind":"EPSS","as_of":"2026-10-31T12:00:27.000Z","value":"0.555%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.46313. Missing scores are unknown.","source_id":"sr-157e7128c848cada057bd0cc58f99bd4"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-ba9337b27309636b06e87fc2673703af","url":"https://github.com/advisories/GHSA-9jh8-v38h-cvhr","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-9jh8-v38h-cvhr","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T22:07:30.906Z"},{"id":"sr-14d2a4ac4bb6bb8e1168598e2ef34920","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-63430","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2026-63430","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-04T02:47:38.696Z"},{"id":"sr-157e7128c848cada057bd0cc58f99bd4","url":"https://www.first.org/epss/data.html","basis":"official_catalog","notes":"FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.","title":"CVE-2026-63430","publisher":"FIRST EPSS","observed_at":"2026-10-31T23:13:27.698Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-ba9337b27309636b06e87fc2673703af"],"technology":"ammonia","known_exclusions":[],"conditions_summary":"If a certain set of MathML tags are enabled, an attacker can inject arbitrary JavaScript code into the user's browser.\n\nThe `annotation-xml` tag has slightly different behavior than the other \"integration point\"\ntags in MathML and SVG, but ammonia didn't handle it, so it didn't correctly\nstrip the namespace-incompatible tags.\n\nThis vulnerability only has an effect when the `math` and `annotation-xml` tags\nare both enabled, but the `encoding` attribute is disabled, because it relies\non the following sequence of steps:\n\n1. User writes code like ``.\n2. Namespace filtering checks the DOM, and it passes. `` is parsed as HTML.\n3. Attribute filter strips it down to ``. Because the encoding attribute is gone, `` is now parsed as MathML.\n4. The gadget is written in such a way that it exploits the parsing differences between HTML and MathML.\n\nAdditionally, the gadget can only be written using a tag that is parsed as raw text in HTML.\nThese [elements] are:\n\n* title\n* textarea\n* xmp\n* iframe\n* noembed\n* noframes\n* plaintext\n* noscript\n* style\n* script","public_affected_ranges":["< 3.3.2"]},{"certainty":"source_listed","source_ids":["sr-ba9337b27309636b06e87fc2673703af"],"technology":"ammonia","known_exclusions":[],"conditions_summary":"If a certain set of MathML tags are enabled, an attacker can inject arbitrary JavaScript code into the user's browser.\n\nThe `annotation-xml` tag has slightly different behavior than the other \"integration point\"\ntags in MathML and SVG, but ammonia didn't handle it, so it didn't correctly\nstrip the namespace-incompatible tags.\n\nThis vulnerability only has an effect when the `math` and `annotation-xml` tags\nare both enabled, but the `encoding` attribute is disabled, because it relies\non the following sequence of steps:\n\n1. User writes code like ``.\n2. Namespace filtering checks the DOM, and it passes. `` is parsed as HTML.\n3. Attribute filter strips it down to ``. Because the encoding attribute is gone, `` is now parsed as MathML.\n4. The gadget is written in such a way that it exploits the parsing differences between HTML and MathML.\n\nAdditionally, the gadget can only be written using a tag that is parsed as raw text in HTML.\nThese [elements] are:\n\n* title\n* textarea\n* xmp\n* iframe\n* noembed\n* noframes\n* plaintext\n* noscript\n* style\n* script","public_affected_ranges":[">= 4.0.0, < 4.0.2"]},{"certainty":"source_listed","source_ids":["sr-ba9337b27309636b06e87fc2673703af"],"technology":"ammonia","known_exclusions":[],"conditions_summary":"If a certain set of MathML tags are enabled, an attacker can inject arbitrary JavaScript code into the user's browser.\n\nThe `annotation-xml` tag has slightly different behavior than the other \"integration point\"\ntags in MathML and SVG, but ammonia didn't handle it, so it didn't correctly\nstrip the namespace-incompatible tags.\n\nThis vulnerability only has an effect when the `math` and `annotation-xml` tags\nare both enabled, but the `encoding` attribute is disabled, because it relies\non the following sequence of steps:\n\n1. User writes code like ``.\n2. Namespace filtering checks the DOM, and it passes. `` is parsed as HTML.\n3. Attribute filter strips it down to ``. Because the encoding attribute is gone, `` is now parsed as MathML.\n4. The gadget is written in such a way that it exploits the parsing differences between HTML and MathML.\n\nAdditionally, the gadget can only be written using a tag that is parsed as raw text in HTML.\nThese [elements] are:\n\n* title\n* textarea\n* xmp\n* iframe\n* noembed\n* noframes\n* plaintext\n* noscript\n* style\n* script","public_affected_ranges":[">= 4.1.0, < 4.1.3"]}],"null_published_at":"2026-11-04T10:04:35.912Z","source_updated_at":"2026-10-22T14:06:14.000Z","source_disclosed_at":"2026-10-22T14:06:10.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Source facts changed; compare the preserved prior revision.","null_first_observed_at":"2026-10-31T22:07:30.906Z"},{"id":"NVI-00010708","kind":"vulnerability","title":"ammonia: mXSS  via MathML `annotation-xml` encoding strip","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-9jh8-v38h-cvhr","CVE-2026-63430"],"plain_summary":"GitHub lists this reviewed advisory for ammonia, ammonia, ammonia. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-157e7128c848cada057bd0cc58f99bd4"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"EPSS","as_of":"2026-10-31T12:00:27.000Z","value":"0.555%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.46313. Missing scores are unknown.","source_id":"sr-157e7128c848cada057bd0cc58f99bd4"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-ba9337b27309636b06e87fc2673703af","url":"https://github.com/advisories/GHSA-9jh8-v38h-cvhr","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-9jh8-v38h-cvhr","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T22:07:30.906Z"},{"id":"sr-157e7128c848cada057bd0cc58f99bd4","url":"https://www.first.org/epss/data.html","basis":"official_catalog","notes":"FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.","title":"CVE-2026-63430","publisher":"FIRST EPSS","observed_at":"2026-10-31T23:13:27.698Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-ba9337b27309636b06e87fc2673703af"],"technology":"ammonia","known_exclusions":[],"conditions_summary":"If a certain set of MathML tags are enabled, an attacker can inject arbitrary JavaScript code into the user's browser.\n\nThe `annotation-xml` tag has slightly different behavior than the other \"integration point\"\ntags in MathML and SVG, but ammonia didn't handle it, so it didn't correctly\nstrip the namespace-incompatible tags.\n\nThis vulnerability only has an effect when the `math` and `annotation-xml` tags\nare both enabled, but the `encoding` attribute is disabled, because it relies\non the following sequence of steps:\n\n1. User writes code like ``.\n2. Namespace filtering checks the DOM, and it passes. `` is parsed as HTML.\n3. Attribute filter strips it down to ``. Because the encoding attribute is gone, `` is now parsed as MathML.\n4. The gadget is written in such a way that it exploits the parsing differences between HTML and MathML.\n\nAdditionally, the gadget can only be written using a tag that is parsed as raw text in HTML.\nThese [elements] are:\n\n* title\n* textarea\n* xmp\n* iframe\n* noembed\n* noframes\n* plaintext\n* noscript\n* style\n* script","public_affected_ranges":["< 3.3.2"]},{"certainty":"source_listed","source_ids":["sr-ba9337b27309636b06e87fc2673703af"],"technology":"ammonia","known_exclusions":[],"conditions_summary":"If a certain set of MathML tags are enabled, an attacker can inject arbitrary JavaScript code into the user's browser.\n\nThe `annotation-xml` tag has slightly different behavior than the other \"integration point\"\ntags in MathML and SVG, but ammonia didn't handle it, so it didn't correctly\nstrip the namespace-incompatible tags.\n\nThis vulnerability only has an effect when the `math` and `annotation-xml` tags\nare both enabled, but the `encoding` attribute is disabled, because it relies\non the following sequence of steps:\n\n1. User writes code like ``.\n2. Namespace filtering checks the DOM, and it passes. `` is parsed as HTML.\n3. Attribute filter strips it down to ``. Because the encoding attribute is gone, `` is now parsed as MathML.\n4. The gadget is written in such a way that it exploits the parsing differences between HTML and MathML.\n\nAdditionally, the gadget can only be written using a tag that is parsed as raw text in HTML.\nThese [elements] are:\n\n* title\n* textarea\n* xmp\n* iframe\n* noembed\n* noframes\n* plaintext\n* noscript\n* style\n* script","public_affected_ranges":[">= 4.0.0, < 4.0.2"]},{"certainty":"source_listed","source_ids":["sr-ba9337b27309636b06e87fc2673703af"],"technology":"ammonia","known_exclusions":[],"conditions_summary":"If a certain set of MathML tags are enabled, an attacker can inject arbitrary JavaScript code into the user's browser.\n\nThe `annotation-xml` tag has slightly different behavior than the other \"integration point\"\ntags in MathML and SVG, but ammonia didn't handle it, so it didn't correctly\nstrip the namespace-incompatible tags.\n\nThis vulnerability only has an effect when the `math` and `annotation-xml` tags\nare both enabled, but the `encoding` attribute is disabled, because it relies\non the following sequence of steps:\n\n1. User writes code like ``.\n2. Namespace filtering checks the DOM, and it passes. `` is parsed as HTML.\n3. Attribute filter strips it down to ``. Because the encoding attribute is gone, `` is now parsed as MathML.\n4. The gadget is written in such a way that it exploits the parsing differences between HTML and MathML.\n\nAdditionally, the gadget can only be written using a tag that is parsed as raw text in HTML.\nThese [elements] are:\n\n* title\n* textarea\n* xmp\n* iframe\n* noembed\n* noframes\n* plaintext\n* noscript\n* style\n* script","public_affected_ranges":[">= 4.1.0, < 4.1.3"]}],"null_published_at":"2026-10-31T23:18:22.440Z","source_updated_at":"2026-10-22T14:06:14.000Z","source_disclosed_at":"2026-10-22T14:06:10.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Dated EPSS estimate updated; this is not a new disclosure or proof of exploitation.","null_first_observed_at":"2026-10-31T22:07:30.906Z"},{"id":"NVI-00010708","kind":"vulnerability","title":"ammonia: mXSS  via MathML `annotation-xml` encoding strip","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-9jh8-v38h-cvhr","CVE-2026-63430"],"plain_summary":"GitHub lists this reviewed advisory for ammonia, ammonia, ammonia. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-ba9337b27309636b06e87fc2673703af"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-ba9337b27309636b06e87fc2673703af","url":"https://github.com/advisories/GHSA-9jh8-v38h-cvhr","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-9jh8-v38h-cvhr","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T22:07:30.906Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-ba9337b27309636b06e87fc2673703af"],"technology":"ammonia","known_exclusions":[],"conditions_summary":"If a certain set of MathML tags are enabled, an attacker can inject arbitrary JavaScript code into the user's browser.\n\nThe `annotation-xml` tag has slightly different behavior than the other \"integration point\"\ntags in MathML and SVG, but ammonia didn't handle it, so it didn't correctly\nstrip the namespace-incompatible tags.\n\nThis vulnerability only has an effect when the `math` and `annotation-xml` tags\nare both enabled, but the `encoding` attribute is disabled, because it relies\non the following sequence of steps:\n\n1. User writes code like ``.\n2. Namespace filtering checks the DOM, and it passes. `` is parsed as HTML.\n3. Attribute filter strips it down to ``. Because the encoding attribute is gone, `` is now parsed as MathML.\n4. The gadget is written in such a way that it exploits the parsing differences between HTML and MathML.\n\nAdditionally, the gadget can only be written using a tag that is parsed as raw text in HTML.\nThese [elements] are:\n\n* title\n* textarea\n* xmp\n* iframe\n* noembed\n* noframes\n* plaintext\n* noscript\n* style\n* script","public_affected_ranges":["< 3.3.2"]},{"certainty":"source_listed","source_ids":["sr-ba9337b27309636b06e87fc2673703af"],"technology":"ammonia","known_exclusions":[],"conditions_summary":"If a certain set of MathML tags are enabled, an attacker can inject arbitrary JavaScript code into the user's browser.\n\nThe `annotation-xml` tag has slightly different behavior than the other \"integration point\"\ntags in MathML and SVG, but ammonia didn't handle it, so it didn't correctly\nstrip the namespace-incompatible tags.\n\nThis vulnerability only has an effect when the `math` and `annotation-xml` tags\nare both enabled, but the `encoding` attribute is disabled, because it relies\non the following sequence of steps:\n\n1. User writes code like ``.\n2. Namespace filtering checks the DOM, and it passes. `` is parsed as HTML.\n3. Attribute filter strips it down to ``. Because the encoding attribute is gone, `` is now parsed as MathML.\n4. The gadget is written in such a way that it exploits the parsing differences between HTML and MathML.\n\nAdditionally, the gadget can only be written using a tag that is parsed as raw text in HTML.\nThese [elements] are:\n\n* title\n* textarea\n* xmp\n* iframe\n* noembed\n* noframes\n* plaintext\n* noscript\n* style\n* script","public_affected_ranges":[">= 4.0.0, < 4.0.2"]},{"certainty":"source_listed","source_ids":["sr-ba9337b27309636b06e87fc2673703af"],"technology":"ammonia","known_exclusions":[],"conditions_summary":"If a certain set of MathML tags are enabled, an attacker can inject arbitrary JavaScript code into the user's browser.\n\nThe `annotation-xml` tag has slightly different behavior than the other \"integration point\"\ntags in MathML and SVG, but ammonia didn't handle it, so it didn't correctly\nstrip the namespace-incompatible tags.\n\nThis vulnerability only has an effect when the `math` and `annotation-xml` tags\nare both enabled, but the `encoding` attribute is disabled, because it relies\non the following sequence of steps:\n\n1. User writes code like ``.\n2. Namespace filtering checks the DOM, and it passes. `` is parsed as HTML.\n3. Attribute filter strips it down to ``. Because the encoding attribute is gone, `` is now parsed as MathML.\n4. The gadget is written in such a way that it exploits the parsing differences between HTML and MathML.\n\nAdditionally, the gadget can only be written using a tag that is parsed as raw text in HTML.\nThese [elements] are:\n\n* title\n* textarea\n* xmp\n* iframe\n* noembed\n* noframes\n* plaintext\n* noscript\n* style\n* script","public_affected_ranges":[">= 4.1.0, < 4.1.3"]}],"null_published_at":"2026-10-31T22:27:12.376Z","source_updated_at":"2026-10-22T14:06:14.000Z","source_disclosed_at":"2026-10-22T14:06:10.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"First indexed by Null; source disclosure date is shown separately.","null_first_observed_at":"2026-10-31T22:07:30.906Z"}],"next_cursor":null,"snapshot_revision":"39771"}