Vulnerability Description
PJSIP is a free and open source multimedia communication library written in C. Prior to commit 8d5956a, a heap buffer overflow exists in the PJLIB-UTIL HTTP client (http_client.c) when buffering an HTTP response body. This affects applications that use the PJLIB-UTIL HTTP client to receive a whole response body at once (a completion callback with no incremental on_data_read callback). When growing the response buffer, an incorrect size calculation based on the server-supplied Content-Length can leave the buffer too small, causing response data to be written past the end of the allocation. A malicious or man-in-the-middle HTTP server can trigger this with a crafted response; impact may range from unexpected application termination to memory corruption. Applications that consume the response incrementally (via on_data_read), or that only connect to trusted servers, are not affected. This issue has been patched via commit 8d5956a.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Teluu | Pjsip | <= 2.17 |
Related Weaknesses (CWE)
References
- https://github.com/pjsip/pjproject/commit/8d5956afab2ede95ddb199078dc19a8ac0114fPatch
- https://github.com/pjsip/pjproject/security/advisories/GHSA-59fr-724j-6fjvPatchVendor Advisory
FAQ
What is CVE-2026-57164?
CVE-2026-57164 is a vulnerability with a CVSS score of 5.9 (MEDIUM). PJSIP is a free and open source multimedia communication library written in C. Prior to commit 8d5956a, a heap buffer overflow exists in the PJLIB-UTIL HTTP client (http_client.c) when buffering an HT...
How severe is CVE-2026-57164?
CVE-2026-57164 has been rated MEDIUM with a CVSS base score of 5.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-57164?
Check the references section above for vendor advisories and patch information. Affected products include: Teluu Pjsip.