CVE-2026-35414 Auth bypass in OpenSSH
OpenSSH mishandles authorized_keys principals with comma characters in certificates, potentially allowing authentication bypass in specific configurations.
- 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-2026-35414?
CVE-2026-35414 is a medium-severity authentication bypass vulnerability in OpenSSH, published on 2 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
OpenSSH before 10.3 mishandles the authorized_keys principals option in uncommon scenarios involving a principals list in conjunction with a Certificate Authority that makes certain use of comma characters.
Weakness: CWE-670
Which versions are affected by CVE-2026-35414?
It affects 1 product.
Products include OpenSSH.
How do I fix CVE-2026-35414?
Upgrade to a fixed version.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-35414 being exploited?
There is no known exploitation of CVE-2026-35414 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in OpenSSH
Sources
Also known as AZL-81788, BELL-CVE-2026-35414, CLSA-2026-1777296725, CLSA-2026-1777307655, CLSA-2026-1777393442, CLSA-2026-1777453408 and 14 more.