Medium severity · published May 7, 2026
CVE-2026-42225
GnuTLS backend silently skips certificate chain verification when verify_peer is false
5.9
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 5% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PJ
pjproject · pjsip
< 2.17 · source: vendor
PJ
Pjsip · Teluu
before 2.17 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-42225
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-42225
Patch
https://github.com/pjsip/pjproject/commit/ef684252bb62b0716675b6e99ad7fe4c90e28920
Product
https://github.com/pjsip/pjproject/releases/tag/2.17
Patch
https://github.com/pjsip/pjproject/security/advisories/GHSA-x2fv-6j6c-pxmx
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