Vulnerability · Published Aug 18, 2026 · Assigned by GitHub_M

CVE-2026-71322Lemur: Missing authorization check on POST /certificates/<id>/export for plugins with requires_key = False

Medium 4.3

In plain English

A medium-severity missing authorization in lemur from Netflix. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 14% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)4.3Medium

Exploit odds (30 days)0.2%top 85.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Lemur manages TLS certificate creation. Prior to 1.9.3, CertificateExport placed its CertificatePermission ownership check inside the plugin.requires_key branch for POST /api/1/certificates//export. A plugin declaring requires_key false bypassed that check, and the handler still passed cert.private_key as an argument and recorded a key_view audit event. The bundled JavaTruststoreExportPlugin ignored the key, so the immediate exposure was limited to public certificate material and misleading audit entries, but a future plugin could have consumed the supplied key. The fix passes no private key to plugins that do not require one and confines ownership checks and key_view logging to actual private-key exports. This issue is fixed in version 1.9.3.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
PyPI	lemur	1.9.3	GHSA-4h97-p9wq-chqj
PyPI	lemur	1.9.3	PYSEC-2026-3673

Affected products (as reported)

Vendor	Product	Versions
Netflix	lemur	< 1.9.3

Weakness: CWE-862 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

References

https://github.com/Netflix/lemur/security/advisories/GHSA-4h97-p9wq-chqj x_refsource_CONFIRM
https://github.com/Netflix/lemur/commit/5683bbea8b10cce07f9a8abf1e4a7d3b2031c585 x_refsource_MISC
https://github.com/Netflix/lemur/releases/tag/v1.9.3 x_refsource_MISC