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OpenAdvisories
High · 8.2 CVE-2026-42225 EUVD-2026-28428

GnuTLS backend silently skips certificate chain verification when verify_peer is false

Published May 7, 2026 · Updated May 8, 2026 · Assigned by GitHub_M

Description

PJSIP is a free and open source multimedia communication library written in C. Prior to version 2.17, on GnuTLS builds, the SIP TLS transport (sip_transport_tls) can accept connections with invalid or untrusted certificates even when the application explicitly enables certificate verification via verify_server = PJ_TRUE or verify_client = PJ_TRUE. This issue has been patched in version 2.17.

Affected products

VendorProductAffectedFixed
pjsip pjproject < 2.17 —

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

ReleasePackageFixed inAdvisory
Debian 14 asterisk 1:22.10.0+dfsg+~cs6.17.60671434-1 —
ReleasePackageFixed inAdvisory
Ubuntu 26.10 asterisk No fix yet —
Ubuntu 26.04 LTS asterisk No fix yet —
Ubuntu 25.10 asterisk No fix yet —
Ubuntu 24.04 LTS asterisk No fix yet —
Ubuntu 22.04 LTS asterisk No fix yet —
Show 4 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Ubuntu 20.04 LTS asterisk No fix yet —
Ubuntu 18.04 LTS asterisk No fix yet —
Ubuntu Pro 18.04 LTS pjproject No fix yet —
Ubuntu Pro 16.04 LTS asterisk +1 No fix yet —

References