PatchTheCVECVE-2026-57160: PJSIP is a free and open source multimedia communication library written in C
CVE-2026-57160 is a medium-severity flaw (CVSS 5.3) 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 commit d6a0e7f, a buffer overflow can occur in pjsip_generic_array_hdr_print() in pjsip/src/pjsip/sip_msg.c, the function that serializes generic array headers (such as Allow, Require, Supported, and Unsupported). Under certain output-buffer boundary conditions the function can write one byte past the end of the buffer. This is reachable mainly in applications
Why this priority
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 5.3 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.4% (top 65%) |
| CISA exploited list | No |
| Weakness | CWE-193 |
| Published | 2026-09-04 |
| Last modified | 2026-09-11 |
Last updated 2026-09-11 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
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-2026-57160?
pjsip: upgrade to newer than 2.17. Exact commands for each OS are on this page.
Is CVE-2026-57160 being exploited?
CVE-2026-57160 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-2026-57160 affect?
CVE-2026-57160 affects pjsip. Severity is medium (CVSS 5.3). PJSIP is a free and open source multimedia communication library written in C. Prior to commit d6a0e7f, a buffer overflow can occur in pjsip_generic_array_hdr_print() in pjsip/src/pjsip/sip_msg.c, the function that serializes generic array
How urgent is CVE-2026-57160?
Priority 32/100. Remotely exploitable, no login, no user action
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