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CVE-2026-42225— GnuTLS backend silently skips certificate chain verification when verify_peer is false

Quick assessment

Affected
pjsip pjproject
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

PJSIP是pjsip开源的一个免费和开源的多媒体通信库，用C语言编写，实现基于标准的协议，如SIP, SDP, RTP, STUN, TURN，和ICE。 PJSIP 2.17之前版本存在信任管理问题漏洞，该漏洞源于在GnuTLS构建中，SIP TLS传输可能接受无效或不受信任证书的连接，即使应用程序明确启用证书验证。

AI Predicted 6.5 Difficulty: Moderate EPSS 0.27% · P17

Affected Version Matrix 1

VendorProduct Version RangeStatus
pjsip pjproject < 2.17 affected
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I. Basic Information for CVE-2026-42225

Vulnerability Information
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Vulnerability Title
GnuTLS backend silently skips certificate chain verification when verify_peer is false
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
证书验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
PJSIP 信任管理问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
PJSIP是pjsip开源的一个免费和开源的多媒体通信库，用C语言编写，实现基于标准的协议，如SIP, SDP, RTP, STUN, TURN，和ICE。 PJSIP 2.17之前版本存在信任管理问题漏洞，该漏洞源于在GnuTLS构建中，SIP TLS传输可能接受无效或不受信任证书的连接，即使应用程序明确启用证书验证。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
pjsip pjproject < 2.17 -

II. Public POCs for CVE-2026-42225

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III. Intelligence Information for CVE-2026-42225

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Patches & Fixes for CVE-2026-42225 (1)

Vendor Advisories for CVE-2026-42225 (1)

Vendor Pages for CVE-2026-42225 (1)

IV. Related Vulnerabilities

Same product: pjproject
Same vendor: pjsip
Same weakness: CWE-295

V. Comments for CVE-2026-42225

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