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.
Metrics
Affected Vendors & Products
References
History
Wed, 19 Aug 2026 20:30:00 +0000
| Type | Values Removed | Values Added |
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| Metrics |
ssvc
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Tue, 18 Aug 2026 21:00:00 +0000
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| First Time appeared |
Netflix
Netflix lemur |
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| Vendors & Products |
Netflix
Netflix lemur |
Tue, 18 Aug 2026 19:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | Lemur: Sub-CA creation never checks `AuthorityPermission` on the parent authority | |
| Weaknesses | CWE-862 | |
| References |
| |
| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-08-19T19:21:56.406Z
Reserved: 2026-08-05T18:14:42.064Z
Link: CVE-2026-71317
Updated: 2026-08-19T15:17:49.796Z
Status : Received
Published: 2026-08-18T20:17:23.910
Modified: 2026-08-19T20:17:22.083
Link: CVE-2026-71317
No data.
OpenCVE Enrichment
Updated: 2026-08-18T21:00:04Z