CVE-2026-17039 Missing authorization in Red Hat Certificate System 10
An authenticated user can renew certificates in unauthorized realms due to a missing authorization check in the CA renewal path.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-17039?
CVE-2026-17039 is a low-severity missing authorization vulnerability in Red Hat Certificate System 10, published on 24 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A flaw was found in pki-core. The certificate authority (CA) renewal request path does not perform the realm-based authorization check that the enrollment path performs, allowing an authenticated user entitled to one realm to cause a certificate belonging to a different realm to be renewed without that realm's authorization.
Weakness: CWE-863
Which versions are affected by CVE-2026-17039?
How do I fix CVE-2026-17039?
No fix has been published for CVE-2026-17039 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-17039 being exploited?
There is no known exploitation of CVE-2026-17039 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-17039, GHSA-jq46-23h4-vfpj, UBUNTU-CVE-2026-17039.