{"cve":"CVE-2026-71317","nvd":{"published":"2026-08-18T20:17:23.910","modified":"2026-10-22T22:10:00.250","status":"Deferred","description":"Lemur manages TLS certificate creation. Prior to 1.9.3, POST /api/1/authorities with type=subca did not require AuthorityPermission on the parent authority when ADMIN_ONLY_AUTHORITY_CREATION was false. AssociatedAuthoritySchema resolved the caller-supplied parent and passed it through authority creation to cryptography-issuer, which used the parent authority_certificate.private_key to sign a new intermediate. Any authenticated non-read-only user in that supported configuration could chain a sub-CA to an internal root for which the user held no role. The resulting intermediate could issue trusted certificates and its private key could be used outside Lemur, bypassing normal issuance controls. The fix checks AuthorityPermission on every supplied parent before invoking the issuer. This issue is fixed in version 1.9.3.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N","score":6.5},"cwes":["CWE-862"],"references":["https://github.com/Netflix/lemur/commit/8669011203ca3dd89d9e39bab9ef6850eca723f9","https://github.com/Netflix/lemur/releases/tag/v1.9.3","https://github.com/Netflix/lemur/security/advisories/GHSA-g7p5-89mh-248h","https://github.com/Netflix/lemur/security/advisories/GHSA-g7p5-89mh-248h"],"products":[],"source":"nvd","synced_at":"2026-10-23T16:39:26.291718493+00:00"},"epss":{"cve":"CVE-2026-71317","score":0.00105,"percentile":0.01066,"date":"2026-10-26"},"kev":null,"osv":[{"id":"GHSA-g7p5-89mh-248h","url":"https://osv.dev/vulnerability/GHSA-g7p5-89mh-248h","summary":"Lemur: Sub-CA creation never checks `AuthorityPermission` on the parent authority","modified":"2026-08-19T12:55:31.770935706Z","packages":[{"ecosystem":"PyPI","name":"lemur","purl":"pkg:pypi/lemur","ranges":["<1.9.3"],"fixed":["1.9.3"]}]},{"id":"PYSEC-2026-3677","url":"https://osv.dev/vulnerability/PYSEC-2026-3677","summary":"Lemur: Sub-CA creation never checks `AuthorityPermission` on the parent authority","modified":"2026-08-19T12:45:11.231888978Z","packages":[{"ecosystem":"PyPI","name":"lemur","purl":"pkg:pypi/lemur","ranges":["<1.9.3"],"fixed":["1.9.3"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}