CVE-2026-71322 Lemur: Missing authorization check on POST /certificates/<id>/export for plugins with requires_key = False
Attackers can bypass ownership checks to export certificates via plugins that do not require private keys, potentially exposing public certificate data and corrupting audit logs.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-71322?
CVE-2026-71322 is a medium-severity missing authorization vulnerability in Netflix lemur, published on 18 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
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.
Weakness: CWE-862
Which versions are affected by CVE-2026-71322?
3 open source packages ship an affected version, including lemur.
| Package | Affected | Fixed in |
|---|---|---|
lemur PyPI | All versions | 1.9.3 |
lemur PyPI | All versions | 1.9.3 |
lemur PyPI | All versions | 1.9.3 |
How do I fix CVE-2026-71322?
Upgrade lemur to 1.9.3 or later.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-71322 being exploited?
There is no known exploitation of CVE-2026-71322 in the wild and no public exploit code.
Sources
Also known as GHSA-4h97-p9wq-chqj, PYSEC-2026-3673.