---
cve: "CVE-2026-57163"
severity: "LOW"
cvss: 3.1
epss: "4.4%"
vendor: "Apple"
kev: false
exploited: false
published: "2026-09-04 18:17:54"
tags: [cve, security, low]
source: tsecurity.de CVE-Dossier
exported: "2026-09-07T00:31:23+02:00"
---

# CVE-2026-57163

> 3.1 LOW

## Beschreibung

PJSIP is a free and open source multimedia communication library written in C. Prior to commit c4a151a, a stack buffer overflow exists in the GnuTLS TLS backend when parsing the Subject Alternative Name extension of a peer certificate (tls_cert_get_info() in ssl_sock_gtls.c). Only GnuTLS builds are affected (--with-gnutls); OpenSSL and Apple SecureTransport/Network.framework builds are not affected. While extracting certificate information after a TLS handshake, an incorrect buffer-size value can cause an oversized SubjectAltName entry to be written past the end of a fixed-size stack buffer. A network-positioned attacker presenting a crafted certificate — a malicious server to a connecting client, or a malicious client to a server that requests certificates — can trigger this during the TLS handshake, before any SIP-level authentication. Impact may range from unexpected application termination to control flow hijack/memory corruption. This issue has been patched via commit c4a151a.

## Patch verfügbar (OSV)

- c4a151af86fadd16d9480b2603eeb2abf4fb4f78 (Commit)

## Referenzen

- <https://github.com/pjsip/pjproject/commit/c4a151af86fadd16d9480b2603eeb2abf4fb4f78>
- <https://github.com/pjsip/pjproject/security/advisories/GHSA-jm2j-6rg6-qvwx>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-57163) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_