CVE-2026-71317 json
Lemur: Sub-CA creation never checks `AuthorityPermission` on the parent authority
published 2mo ago modified 20d ago also EUVD-2026-61156 , GHSA-g7p5-89mh-248h , PYSEC-2026-3677
- cvss
- 6.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.1%
- EPSS 0.1% chance of exploitation in 30 days, percentile 1%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- pypi lemur 1.9.3
- netflix lemur 1.9.3
Is CVE-2026-71317 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2mo ago
Exploit prediction
0.11% chance of exploitation in the next 30 days, higher than 1% of all scored CVEs (FIRST EPSS, 2026-11-11).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N |
| GitHub | 3.1 | 6.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N |
| OSV | 3.1 | 6.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | lemur | <1.9.3 |
1.9.3 |
Affected products
- Netflix lemur
Classification
- Weakness
-
- CWE-862 Missing Authorization
References
-
github.com
/Netflix/lemur/commit/8669011203ca3dd89d9e39bab9ef6850eca723f9
web
-
github.com
/Netflix/lemur/security/advisories/GHSA-g7p5-89mh-248h
not-applicable, web
-
github.com
/Netflix/lemur/releases/tag/v1.9.3
web
-
github.com
/Netflix/lemur
package
-
pypi.org
/project/lemur
package
-
github.com
/advisories/GHSA-g7p5-89mh-248h
advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-71317
advisory
Sources
- CVE List CVE-2026-71317
- GitHub Advisory GHSA-g7p5-89mh-248h
- NVD CVE-2026-71317
- OSV PYSEC-2026-3677
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.