Alpine Linux OpenSSH Auth Bypass Patched
Alpine Linux fixed an OpenSSH password authentication bypass vulnerability affecting versions 3.16 through 3.24; patches are available.
Sourcecert.cyber.gouv.fr — open the original
What to check
- Applies to
- The 1 CVE named below. Whether you run an affected version is not assessed: check the versions the source lists.
- Exploitation
- CISA lists CVE-2026-119977 as exploited in the wild.
CERT-FR published an advisory regarding a security policy bypass vulnerability in Alpine Linux, specifically tied to an OpenSSH password authentication bypass flaw tracked as CVE-2026-119977. The issue affects Alpine versions 3.21.x prior to 3.21.10, 3.22.x prior to 3.22.8, 3.23.x prior to 3.23.8, and 3.24.x prior to 3.24.4, as well as older unsupported branches from 3.16 to 3.20.
The vulnerability allows an attacker to circumvent security policy controls, specifically related to OpenSSH password authentication. While support for the 3.21 branch officially ended on November 1, 2026, Alpine has provided patches for all affected versions including the end-of-life branches. No indication of active exploitation in the wild is mentioned in this advisory.
Defenders running Alpine Linux systems with OpenSSH should prioritize patching to the fixed versions referenced in Alpine's security bulletin dated November 5, 2026. Organizations using older unsupported branches (3.16-3.20) should also apply available patches despite the end-of-support status, or plan migration to a supported release.
Mentioned in this report
Source reporting: https://www.cert.cyber.gouv.fr/avis/CERTFR-2026-AVI-1480
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