CVE-2026-42225: PJSIP is a free and open source multimedia communication library written in C

Q: How do I fix CVE-2026-42225?

pjsip: upgrade to 2.17. Exact commands for each OS are on this page.

Q: Is CVE-2026-42225 being exploited?

CVE-2026-42225 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-42225 affect?

CVE-2026-42225 affects pjsip. Severity is medium (CVSS 5.9). 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 ap

Q: How urgent is CVE-2026-42225?

Priority 27/100. Remotely exploitable, no login, no user action

Routine

MEDIUM 5.9REMOTEUPGRADE

CVE-2026-42225 is a medium-severity flaw (CVSS 5.9) affecting pjsip. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.9 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.2% (top 95%)
CISA exploited list	No
Weakness	CWE-295
Published	2026-05-07
Last modified	2026-10-26

Publisher (CNA): GitHub, Inc. · Vendor: teluu

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-07 20:16 UTCPublished CVE record published
2026-10-26 20:10 UTCUpdated Record last modified

teluu pjsip UPGRADE

Affected: < 2.17

Fixed in: 2.17

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy pjsip || rpm -q pjsip || pjsip --version

2. UPGRADE to 2.17 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade pjsip

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade pjsip

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-42225?

pjsip: upgrade to 2.17. Exact commands for each OS are on this page.

Is CVE-2026-42225 being exploited?

CVE-2026-42225 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-42225 affect?

CVE-2026-42225 affects pjsip. Severity is medium (CVSS 5.9). 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 ap

How urgent is CVE-2026-42225?

Priority 27/100. Remotely exploitable, no login, no user action

Software pages

GnuTLS vulnerabilities

Related CVEs

CVE-2026-40892 CRITICAL 9.8 UPGRADE PJSIP is a free and open source multimedia communication library written in C
CVE-2026-41415 CRITICAL 9.1 UPGRADE PJSIP is a free and open source multimedia communication library written in C
CVE-2026-40614 HIGH 8.8 UPGRADE PJSIP is a free and open source multimedia communication library written in C
CVE-2026-41416 HIGH 7.5 UPGRADE PJSIP is a free and open source multimedia communication library written in C
CVE-2026-84975 HIGH 7.4 UPGRADE PJSIP is a free and open source multimedia communication library written in C

References

← Back to latest CVEs