{"items":[{"id":"NVI-00015220","kind":"vulnerability","title":"Lemur: SSRF protection in certificate revocation checking bypassable via HTTP redirects and DNS rebinding (incomplete fix for GHSA-54vg-pfh7-jq95)","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-f3qq-49m6-rw8f","CVE-2026-70667"],"plain_summary":"GitHub lists this reviewed advisory for lemur. 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-2c64ee54dc26b7a86bd8638c4e03966a"],"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":"2026-08-18T20:51:13.000Z","value":"6.3 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-430dca3118e5988056c5460b55d35818"},{"kind":"CVSS","as_of":"2026-10-22T22:10:00.250Z","value":"6.3 MEDIUM (3.1)","meaning":"security-advisories@github.com severity; no combined Null risk score.","source_id":"sr-01ce47ca5c59bafbe5b0333a7cc8dc91"},{"kind":"EPSS","as_of":"2026-11-03T12:00:27.000Z","value":"0.179%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.07548. Missing scores are unknown.","source_id":"sr-2c64ee54dc26b7a86bd8638c4e03966a"}],"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-430dca3118e5988056c5460b55d35818","url":"https://github.com/advisories/GHSA-f3qq-49m6-rw8f","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-f3qq-49m6-rw8f","publisher":"GitHub Advisory Database","observed_at":"2026-11-02T20:14:33.912Z"},{"id":"sr-01ce47ca5c59bafbe5b0333a7cc8dc91","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-70667","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2026-70667","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-08T15:08:07.832Z"},{"id":"sr-2c64ee54dc26b7a86bd8638c4e03966a","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-2026-70667","publisher":"FIRST EPSS","observed_at":"2026-11-03T17:45:16.078Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-430dca3118e5988056c5460b55d35818"],"technology":"lemur","known_exclusions":[],"conditions_summary":"## Summary\nThe SSRF mitigation added for GHSA-54vg-pfh7-jq95 (`_validate_revocation_url()` in `lemur\n/certificates/verify.py`) can be bypassed. An operator-role user who uploads a certificate with attacker-controlled CRL/OCSP extensions can still make Lemur reach internal destinations (RFC1918, loopback, link-local 169.254.169.254) during verification.\n\n## Affected version\nTested against `main` (the commit that introduced `_validate_revocation_url`). The 1.9.2 release predates that guard and is vulnerable to the original SSRF (GHSA-54vg-pfh7-jq95) directly; this bypass applies to the unreleased mitigation in `main`. Please map the affected range to whichever release will first contain `_validate_revocation_url`.\n\n## Bypass 1 — HTTP redirect (deterministic)\nThe guard validates only the URL in the certificate; the CRL fetch then follows redirects without re-validating the target:\n```python\n# lemur/certificates/verify.py:174\nresponse = requests.get(point, timeout=(3.05, 6))   \n```\nThe attacker hosts the CRL URL on a public host they control (passes the guard); that host returns `302 Location: http://169.254.169.254/...`. `requests` follows it to the internal target the guard never ins","public_affected_ranges":["< 1.9.3"]}],"null_published_at":"2026-11-08T19:53:44.015Z","source_updated_at":"2026-08-18T20:51:13.000Z","source_disclosed_at":"2026-08-18T20:51:12.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Source facts changed; compare the preserved prior revision.","null_first_observed_at":"2026-11-02T20:14:33.912Z"},{"id":"NVI-00015220","kind":"vulnerability","title":"Lemur: SSRF protection in certificate revocation checking bypassable via HTTP redirects and DNS rebinding (incomplete fix for GHSA-54vg-pfh7-jq95)","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-f3qq-49m6-rw8f","CVE-2026-70667"],"plain_summary":"GitHub lists this reviewed advisory for lemur. 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-430dca3118e5988056c5460b55d35818"],"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":"2026-08-18T20:51:13.000Z","value":"6.3 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-430dca3118e5988056c5460b55d35818"}],"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-430dca3118e5988056c5460b55d35818","url":"https://github.com/advisories/GHSA-f3qq-49m6-rw8f","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-f3qq-49m6-rw8f","publisher":"GitHub Advisory Database","observed_at":"2026-11-02T20:14:33.912Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-430dca3118e5988056c5460b55d35818"],"technology":"lemur","known_exclusions":[],"conditions_summary":"## Summary\nThe SSRF mitigation added for GHSA-54vg-pfh7-jq95 (`_validate_revocation_url()` in `lemur\n/certificates/verify.py`) can be bypassed. An operator-role user who uploads a certificate with attacker-controlled CRL/OCSP extensions can still make Lemur reach internal destinations (RFC1918, loopback, link-local 169.254.169.254) during verification.\n\n## Affected version\nTested against `main` (the commit that introduced `_validate_revocation_url`). The 1.9.2 release predates that guard and is vulnerable to the original SSRF (GHSA-54vg-pfh7-jq95) directly; this bypass applies to the unreleased mitigation in `main`. Please map the affected range to whichever release will first contain `_validate_revocation_url`.\n\n## Bypass 1 — HTTP redirect (deterministic)\nThe guard validates only the URL in the certificate; the CRL fetch then follows redirects without re-validating the target:\n```python\n# lemur/certificates/verify.py:174\nresponse = requests.get(point, timeout=(3.05, 6))   \n```\nThe attacker hosts the CRL URL on a public host they control (passes the guard); that host returns `302 Location: http://169.254.169.254/...`. `requests` follows it to the internal target the guard never ins","public_affected_ranges":["< 1.9.3"]}],"null_published_at":"2026-11-03T10:03:26.562Z","source_updated_at":"2026-08-18T20:51:13.000Z","source_disclosed_at":"2026-08-18T20:51:12.000Z","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":"2026-11-02T20:14:33.912Z"}],"next_cursor":null,"snapshot_revision":"42594"}