{"items":[{"id":"NVI-00010557","kind":"vulnerability","title":"Authlib: empty signatures validation in JWS JSON deserialization","revision":4,"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-6v38-4h7w-rj9h","CVE-2026-96760"],"plain_summary":"GitHub lists this reviewed advisory for authlib. 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-016ed9377fd7b4175202b85acc1f8f4a"],"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":"2026-10-27T14:50:19.000Z","value":"9.1 critical","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-3ab2a87ab1a9d444af406a704f4a0abb"},{"kind":"CVSS","as_of":"2026-10-01T14:17:32.147Z","value":"9.8 CRITICAL (3.1)","meaning":"134c704f-9b21-4f2e-91b3-4a467353bcc0 severity; no combined Null risk score.","source_id":"sr-3aef780d6fc71f193b470cca272246ca"},{"kind":"EPSS","as_of":"2026-11-06T12:00:23.000Z","value":"0.433%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.37781. Missing scores are unknown.","source_id":"sr-016ed9377fd7b4175202b85acc1f8f4a"}],"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-3ab2a87ab1a9d444af406a704f4a0abb","url":"https://github.com/advisories/GHSA-6v38-4h7w-rj9h","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-6v38-4h7w-rj9h","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T22:06:46.371Z"},{"id":"sr-3aef780d6fc71f193b470cca272246ca","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-96760","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2026-96760","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-04T09:59:59.040Z"},{"id":"sr-016ed9377fd7b4175202b85acc1f8f4a","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-2026-96760","publisher":"FIRST EPSS","observed_at":"2026-11-07T00:50:47.058Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-3ab2a87ab1a9d444af406a704f4a0abb"],"technology":"authlib","known_exclusions":[],"conditions_summary":"Authlib (prior to 1.9.0) contains a signature verification bypass vulnerability. The JsonWebSignature.deserialize_json() method accepts a JSON Serialization JWS object and returns the payload as successfully verified without checking for a signature and without requiring a cryptographic key.\n\n## Root cause\n\n`authlib/jose/rfc7515/jws.py`, read on the installed 1.8.0 artifact:\n\n```python\nis_valid = True                        # set before anything is checked\nfor header_obj in obj[\"signatures\"]:   # empty array means the body never runs\n    jws_header, valid = self._validate_json_jws(...)\n    if not valid:\n        is_valid = False\n...\nif is_valid:\n    return rv                          # returns the payload as verified\n```\n\n`is_valid` is initialised to `True` and only ever set to `False` from inside the loop. A JWS JSON\nSerialization object whose `signatures` array is empty iterates zero times, so the flag survives and\nthe payload is returned as successfully verified. No key is consulted, because no signature is\nexamined.\n\n## Reproduction\n\n```python\nimport base64\nfrom authlib.jose import JsonWebSignature\n\ndef b64(b):\n    return base64.urlsafe_b64encode(b).rstrip(b\"=\").decode()\n\njws = ","public_affected_ranges":["<= 1.8.0"]}],"null_published_at":"2026-11-07T22:29:26.080Z","source_updated_at":"2026-10-27T14:50:19.000Z","source_disclosed_at":"2026-10-27T14:50:18.000Z","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":"2026-10-31T22:06:46.371Z"},{"id":"NVI-00010557","kind":"vulnerability","title":"Authlib: empty signatures validation in JWS JSON deserialization","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-6v38-4h7w-rj9h","CVE-2026-96760"],"plain_summary":"GitHub lists this reviewed advisory for authlib. 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-0194ad7b3f376fa0e2d1da8d6d37b07e"],"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":"2026-10-27T14:50:19.000Z","value":"9.1 critical","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-3ab2a87ab1a9d444af406a704f4a0abb"},{"kind":"CVSS","as_of":"2026-10-01T14:17:32.147Z","value":"9.8 CRITICAL (3.1)","meaning":"134c704f-9b21-4f2e-91b3-4a467353bcc0 severity; no combined Null risk score.","source_id":"sr-3aef780d6fc71f193b470cca272246ca"},{"kind":"EPSS","as_of":"2026-11-02T12:00:30.000Z","value":"0.433%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.37601. Missing scores are unknown.","source_id":"sr-0194ad7b3f376fa0e2d1da8d6d37b07e"}],"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-3ab2a87ab1a9d444af406a704f4a0abb","url":"https://github.com/advisories/GHSA-6v38-4h7w-rj9h","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-6v38-4h7w-rj9h","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T22:06:46.371Z"},{"id":"sr-3aef780d6fc71f193b470cca272246ca","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-96760","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2026-96760","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-04T09:59:59.040Z"},{"id":"sr-0194ad7b3f376fa0e2d1da8d6d37b07e","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-2026-96760","publisher":"FIRST EPSS","observed_at":"2026-11-02T20:17:01.146Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-3ab2a87ab1a9d444af406a704f4a0abb"],"technology":"authlib","known_exclusions":[],"conditions_summary":"Authlib (prior to 1.9.0) contains a signature verification bypass vulnerability. The JsonWebSignature.deserialize_json() method accepts a JSON Serialization JWS object and returns the payload as successfully verified without checking for a signature and without requiring a cryptographic key.\n\n## Root cause\n\n`authlib/jose/rfc7515/jws.py`, read on the installed 1.8.0 artifact:\n\n```python\nis_valid = True                        # set before anything is checked\nfor header_obj in obj[\"signatures\"]:   # empty array means the body never runs\n    jws_header, valid = self._validate_json_jws(...)\n    if not valid:\n        is_valid = False\n...\nif is_valid:\n    return rv                          # returns the payload as verified\n```\n\n`is_valid` is initialised to `True` and only ever set to `False` from inside the loop. A JWS JSON\nSerialization object whose `signatures` array is empty iterates zero times, so the flag survives and\nthe payload is returned as successfully verified. No key is consulted, because no signature is\nexamined.\n\n## Reproduction\n\n```python\nimport base64\nfrom authlib.jose import JsonWebSignature\n\ndef b64(b):\n    return base64.urlsafe_b64encode(b).rstrip(b\"=\").decode()\n\njws = ","public_affected_ranges":["<= 1.8.0"]}],"null_published_at":"2026-11-04T10:04:35.934Z","source_updated_at":"2026-10-27T14:50:19.000Z","source_disclosed_at":"2026-10-27T14:50:18.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Source facts changed; compare the preserved prior revision.","null_first_observed_at":"2026-10-31T22:06:46.371Z"},{"id":"NVI-00010557","kind":"vulnerability","title":"Authlib: empty signatures validation in JWS JSON deserialization","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-6v38-4h7w-rj9h","CVE-2026-96760"],"plain_summary":"GitHub lists this reviewed advisory for authlib. 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-0194ad7b3f376fa0e2d1da8d6d37b07e"],"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":"2026-10-27T14:50:19.000Z","value":"9.1 critical","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-3ab2a87ab1a9d444af406a704f4a0abb"},{"kind":"EPSS","as_of":"2026-11-02T12:00:30.000Z","value":"0.433%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.37601. Missing scores are unknown.","source_id":"sr-0194ad7b3f376fa0e2d1da8d6d37b07e"}],"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-3ab2a87ab1a9d444af406a704f4a0abb","url":"https://github.com/advisories/GHSA-6v38-4h7w-rj9h","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-6v38-4h7w-rj9h","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T22:06:46.371Z"},{"id":"sr-0194ad7b3f376fa0e2d1da8d6d37b07e","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-2026-96760","publisher":"FIRST EPSS","observed_at":"2026-11-02T20:17:01.146Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-3ab2a87ab1a9d444af406a704f4a0abb"],"technology":"authlib","known_exclusions":[],"conditions_summary":"Authlib (prior to 1.9.0) contains a signature verification bypass vulnerability. The JsonWebSignature.deserialize_json() method accepts a JSON Serialization JWS object and returns the payload as successfully verified without checking for a signature and without requiring a cryptographic key.\n\n## Root cause\n\n`authlib/jose/rfc7515/jws.py`, read on the installed 1.8.0 artifact:\n\n```python\nis_valid = True                        # set before anything is checked\nfor header_obj in obj[\"signatures\"]:   # empty array means the body never runs\n    jws_header, valid = self._validate_json_jws(...)\n    if not valid:\n        is_valid = False\n...\nif is_valid:\n    return rv                          # returns the payload as verified\n```\n\n`is_valid` is initialised to `True` and only ever set to `False` from inside the loop. A JWS JSON\nSerialization object whose `signatures` array is empty iterates zero times, so the flag survives and\nthe payload is returned as successfully verified. No key is consulted, because no signature is\nexamined.\n\n## Reproduction\n\n```python\nimport base64\nfrom authlib.jose import JsonWebSignature\n\ndef b64(b):\n    return base64.urlsafe_b64encode(b).rstrip(b\"=\").decode()\n\njws = ","public_affected_ranges":["<= 1.8.0"]}],"null_published_at":"2026-11-03T17:49:14.975Z","source_updated_at":"2026-10-27T14:50:19.000Z","source_disclosed_at":"2026-10-27T14:50:18.000Z","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":"2026-10-31T22:06:46.371Z"},{"id":"NVI-00010557","kind":"vulnerability","title":"Authlib: empty signatures validation in JWS JSON deserialization","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-6v38-4h7w-rj9h","CVE-2026-96760"],"plain_summary":"GitHub lists this reviewed advisory for authlib. 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-3ab2a87ab1a9d444af406a704f4a0abb"],"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":"2026-10-27T14:50:19.000Z","value":"9.1 critical","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-3ab2a87ab1a9d444af406a704f4a0abb"}],"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-3ab2a87ab1a9d444af406a704f4a0abb","url":"https://github.com/advisories/GHSA-6v38-4h7w-rj9h","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-6v38-4h7w-rj9h","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T22:06:46.371Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-3ab2a87ab1a9d444af406a704f4a0abb"],"technology":"authlib","known_exclusions":[],"conditions_summary":"Authlib (prior to 1.9.0) contains a signature verification bypass vulnerability. The JsonWebSignature.deserialize_json() method accepts a JSON Serialization JWS object and returns the payload as successfully verified without checking for a signature and without requiring a cryptographic key.\n\n## Root cause\n\n`authlib/jose/rfc7515/jws.py`, read on the installed 1.8.0 artifact:\n\n```python\nis_valid = True                        # set before anything is checked\nfor header_obj in obj[\"signatures\"]:   # empty array means the body never runs\n    jws_header, valid = self._validate_json_jws(...)\n    if not valid:\n        is_valid = False\n...\nif is_valid:\n    return rv                          # returns the payload as verified\n```\n\n`is_valid` is initialised to `True` and only ever set to `False` from inside the loop. A JWS JSON\nSerialization object whose `signatures` array is empty iterates zero times, so the flag survives and\nthe payload is returned as successfully verified. No key is consulted, because no signature is\nexamined.\n\n## Reproduction\n\n```python\nimport base64\nfrom authlib.jose import JsonWebSignature\n\ndef b64(b):\n    return base64.urlsafe_b64encode(b).rstrip(b\"=\").decode()\n\njws = ","public_affected_ranges":["<= 1.8.0"]}],"null_published_at":"2026-10-31T22:27:09.621Z","source_updated_at":"2026-10-27T14:50:19.000Z","source_disclosed_at":"2026-10-27T14:50:18.000Z","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":"2026-10-31T22:06:46.371Z"}],"next_cursor":null,"snapshot_revision":"42594"}