{"items":[{"id":"NVI-00006641","kind":"vulnerability","title":"league/commonmark: Denial of service via crafted code fences, reference links, and emphasis delimiters","revision":3,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-j8pm-gj4c-rq4x","CVE-2026-86430"],"plain_summary":"OSV carries this publisher advisory for league/commonmark. This is an aggregated source copy; consult the original publisher and compare update dates.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"The original advisory lists fixed boundaries 2.9.1 for league/commonmark. Confirm the publisher’s latest guidance.","source_ids":["sr-bcc32a81467505387289db564ae60cff"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-2b524899a01a4b9a497cfb537309b495"],"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":"2026-11-01T12:00:16.000Z","value":"0.493%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.42377. Missing scores are unknown.","source_id":"sr-2b524899a01a4b9a497cfb537309b495"}],"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-bcc32a81467505387289db564ae60cff","url":"https://github.com/advisories/GHSA-j8pm-gj4c-rq4x","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-j8pm-gj4c-rq4x","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:42:20.440Z"},{"id":"sr-2b524899a01a4b9a497cfb537309b495","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-2026-86430","publisher":"FIRST EPSS","observed_at":"2026-11-01T14:28:32.288Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-bcc32a81467505387289db564ae60cff"],"technology":"league/commonmark","known_exclusions":[],"conditions_summary":"### Impact\n\nAffected versions of `league/commonmark` perform super-linear work on three independent parsing paths, all of which are reachable on a stock `new CommonMarkConverter()` with default configuration and no extensions registered. Each trigger fits on a single line of input, so no complex Markdown structure is required.\n\nThe three paths were introduced at different times. This advisory's version range is their union; the individual ranges are:\n\n| Path | Affected from | Affected through |\n|---|---|---|\n| 1. Fenced code block detection | `0.6.0` | `2.9.0` |\n| 2. Reference link label lookup | `0.6.0` | `2.9.0` |\n| 3. Emphasis / strikethrough delimiters (`*`, `_`, `~`) | `2.6.0` | `2.9.0` |\n| 3. Highlight delimiters (`=`) | `2.9.0` | `2.9.0` |\n\n**1. Fenced code block detection — quadratic, affected from 0.6.0.**\n\n`FencedCodeStartParser` matches the following pattern:\n\n```\n/^[ \\t]*(?:`{3,}(?!.*`)|~{3,})/\n```\n\nThe lookahead enforces the CommonMark rule that a backtick fence's info string may not itself contain a backtick, but neither the lookahead nor the backtick run it guards is atomic or possessive. On a line consisting of a long backtick run, filler text, and a single trailing","public_affected_ranges":["ECOSYSTEM: introduced 0.6.0; fixed 2.9.1"]}],"null_published_at":"2026-11-06T15:18:11.456Z","source_updated_at":"2026-09-08T12:38:32.269Z","source_disclosed_at":"2026-09-01T20:17:59.000Z","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":"2026-10-31T21:42:20.440Z"},{"id":"NVI-00006641","kind":"vulnerability","title":"league/commonmark: Denial of service via crafted code fences, reference links, and emphasis delimiters","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-j8pm-gj4c-rq4x","CVE-2026-86430"],"plain_summary":"OSV carries this publisher advisory for league/commonmark. This is an aggregated source copy; consult the original publisher and compare update dates.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"The original advisory lists fixed boundaries 2.9.1 for league/commonmark. Confirm the publisher’s latest guidance.","source_ids":["sr-bcc32a81467505387289db564ae60cff"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-8d5f1e6e6709cc403c2c31eff83f90ce"],"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":"0.493%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.4238. Missing scores are unknown.","source_id":"sr-8d5f1e6e6709cc403c2c31eff83f90ce"}],"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-bcc32a81467505387289db564ae60cff","url":"https://github.com/advisories/GHSA-j8pm-gj4c-rq4x","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-j8pm-gj4c-rq4x","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:42:20.440Z"},{"id":"sr-8d5f1e6e6709cc403c2c31eff83f90ce","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-2026-86430","publisher":"FIRST EPSS","observed_at":"2026-10-31T22:06:15.385Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-bcc32a81467505387289db564ae60cff"],"technology":"league/commonmark","known_exclusions":[],"conditions_summary":"### Impact\n\nAffected versions of `league/commonmark` perform super-linear work on three independent parsing paths, all of which are reachable on a stock `new CommonMarkConverter()` with default configuration and no extensions registered. Each trigger fits on a single line of input, so no complex Markdown structure is required.\n\nThe three paths were introduced at different times. This advisory's version range is their union; the individual ranges are:\n\n| Path | Affected from | Affected through |\n|---|---|---|\n| 1. Fenced code block detection | `0.6.0` | `2.9.0` |\n| 2. Reference link label lookup | `0.6.0` | `2.9.0` |\n| 3. Emphasis / strikethrough delimiters (`*`, `_`, `~`) | `2.6.0` | `2.9.0` |\n| 3. Highlight delimiters (`=`) | `2.9.0` | `2.9.0` |\n\n**1. Fenced code block detection — quadratic, affected from 0.6.0.**\n\n`FencedCodeStartParser` matches the following pattern:\n\n```\n/^[ \\t]*(?:`{3,}(?!.*`)|~{3,})/\n```\n\nThe lookahead enforces the CommonMark rule that a backtick fence's info string may not itself contain a backtick, but neither the lookahead nor the backtick run it guards is atomic or possessive. On a line consisting of a long backtick run, filler text, and a single trailing","public_affected_ranges":["ECOSYSTEM: introduced 0.6.0; fixed 2.9.1"]}],"null_published_at":"2026-11-03T02:33:09.139Z","source_updated_at":"2026-09-08T12:38:32.269Z","source_disclosed_at":"2026-09-01T20:17:59.000Z","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":"2026-10-31T21:42:20.440Z"},{"id":"NVI-00006641","kind":"vulnerability","title":"league/commonmark: Denial of service via crafted code fences, reference links, and emphasis delimiters","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-j8pm-gj4c-rq4x","CVE-2026-86430"],"plain_summary":"OSV carries this publisher advisory for league/commonmark. This is an aggregated source copy; consult the original publisher and compare update dates.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"The original advisory lists fixed boundaries 2.9.1 for league/commonmark. Confirm the publisher’s latest guidance.","source_ids":["sr-bcc32a81467505387289db564ae60cff"],"action_type":"vendor_patch","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-bcc32a81467505387289db564ae60cff","url":"https://github.com/advisories/GHSA-j8pm-gj4c-rq4x","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-j8pm-gj4c-rq4x","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:42:20.440Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-bcc32a81467505387289db564ae60cff"],"technology":"league/commonmark","known_exclusions":[],"conditions_summary":"### Impact\n\nAffected versions of `league/commonmark` perform super-linear work on three independent parsing paths, all of which are reachable on a stock `new CommonMarkConverter()` with default configuration and no extensions registered. Each trigger fits on a single line of input, so no complex Markdown structure is required.\n\nThe three paths were introduced at different times. This advisory's version range is their union; the individual ranges are:\n\n| Path | Affected from | Affected through |\n|---|---|---|\n| 1. Fenced code block detection | `0.6.0` | `2.9.0` |\n| 2. Reference link label lookup | `0.6.0` | `2.9.0` |\n| 3. Emphasis / strikethrough delimiters (`*`, `_`, `~`) | `2.6.0` | `2.9.0` |\n| 3. Highlight delimiters (`=`) | `2.9.0` | `2.9.0` |\n\n**1. Fenced code block detection — quadratic, affected from 0.6.0.**\n\n`FencedCodeStartParser` matches the following pattern:\n\n```\n/^[ \\t]*(?:`{3,}(?!.*`)|~{3,})/\n```\n\nThe lookahead enforces the CommonMark rule that a backtick fence's info string may not itself contain a backtick, but neither the lookahead nor the backtick run it guards is atomic or possessive. On a line consisting of a long backtick run, filler text, and a single trailing","public_affected_ranges":["ECOSYSTEM: introduced 0.6.0; fixed 2.9.1"]}],"null_published_at":"2026-10-31T22:13:10.066Z","source_updated_at":"2026-09-08T12:38:32.269Z","source_disclosed_at":"2026-09-01T20:17:59.000Z","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":"2026-10-31T21:42:20.440Z"}],"next_cursor":null,"snapshot_revision":"42594"}