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CVE-2026-28799

PJSIP: Heap use-after-free in PJSIP presence subscription termination handler

PJSIP is a free and open source multimedia communication library written in C. Prior to version 2.17, a heap use-after-free vulnerability exists in PJSIP's event subscription framework (evsub.c) that is triggered during presence unsubscription (SUBSCRIBE with Expires=0). This issue has been patched in version 2.17.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Vendors
Pjsip
Products
Pjproject Pjsip
CVE-2025-65102

PJSIP is vulnerable to buffer overflow in Opus PLC

PJSIP is a free and open source multimedia communication library. Prior to version 2.16, Opus PLC may zero-fill the input frame as long as the decoder ptime, while the input frame length, which is based on stream ptime, may be less than that. This issue affects PJSIP users who use the Opus audio codec in receiving direction. The vulnerability can lead to unexpected application termination due to a memory overwrite. This issue has been patched in version 2.16.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Vendors
Pjsip
Products
Pjsip
CVE-2026-34235

PJSIP: Heap OOB read in VPX unpacketizer

PJSIP is a free and open source multimedia communication library written in C. Prior to version 2.17, a heap out-of-bounds read vulnerability exists in PJSIP's VP9 RTP unpacketizer that occurs when parsing crafted VP9 Scalability Structure (SS) data. Insufficient bounds checking on the payload descriptor length may cause reads beyond the allocated RTP payload buffer. This issue has been patched in version 2.17. A workaround for this issue involves disabling VP9 codec if not needed.

CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed
Vendors
Pjsip Teluu
Products
Pjproject Pjsip
CVE-2026-33069

PJSIP has an Out-of-bounds Read in SIP multipart parsing

PJSIP is a free and open source multimedia communication library written in C. Versions 2.16 and below have a cascading out-of-bounds heap read in pjsip_multipart_parse(). After boundary string matching, curptr is advanced past the delimiter without verifying it has not reached the buffer end. This allows 1-2 bytes of adjacent heap memory to be read. All applications that process incoming SIP messages with multipart bodies or SDP content are potentially affected. This issue is resolved in version 2.17.

CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed
Vendors
Pjsip
Products
Pjproject Pjsip
CVE-2026-32942

PJSIP has ICE session use-after-free race conditions

PJSIP is a free and open source multimedia communication library written in C. Versions 2.16 and below contain a heap use-after-free vulnerability in the ICE session that occurs when there are race conditions between session destruction and the callbacks. This issue has been fixed in version 2.17.

CVSS 4.0 · 8 High EPSS < 1% KEV · Not listed
Vendors
Pjsip
Products
Pjproject Pjsip
CVE-2026-32945

PJSIP is vulnerable to Heap-based Buffer Overflow through DNS parser

PJSIP is a free and open source multimedia communication library written in C. Versions 2.16 and below have a Heap-based Buffer Overflowvulnerability in the DNS parser's name length handler. Thisimpacts applications using PJSIP's built-in DNS resolver, such as those configured with pjsua_config.nameserver or UaConfig.nameserver in PJSUA/PJSUA2. It does not affect users who rely on the OS resolver (e.g., getaddrinfo()) by not configuring a nameserver, or those using an external resolver via pjsip_resolver_set_ext_resolver(). This issue is fixed in version 2.17. For users unable to upgrade, a workaround is to disable DNS resolution in the PJSIP config (by setting nameserver_count to zero) or to use an external resolver implementation instead.

CVSS 4.0 · 8.4 High EPSS < 1% KEV · Not listed
Vendors
Pjsip
Products
Pjproject Pjsip
CVE-2022-39244

Buffer overflow in pjlib scanner and pjmedia

PJSIP is a free and open source multimedia communication library written in C. In versions of PJSIP prior to 2.13 the PJSIP parser, PJMEDIA RTP decoder, and PJMEDIA SDP parser are affeced by a buffer overflow vulnerability. Users connecting to untrusted clients are at risk. This issue has been patched and is available as commit c4d3498 in the master branch and will be included in releases 2.13 and later. Users are advised to upgrade. There are no known workarounds for this issue.

CVSS 3.1 · 7.5 High EPSS 1.5% KEV · Not listed
Vendors
Pjsip
Products
Pjsip
CVE-2022-24793

Potential heap buffer overflow when parsing DNS packets in PJSIP

PJSIP is a free and open source multimedia communication library written in C. A buffer overflow vulnerability in versions 2.12 and prior affects applications that use PJSIP DNS resolution. It doesn't affect PJSIP users who utilize an external resolver. This vulnerability is related to CVE-2023-27585. The difference is that this issue is in parsing the query record `parse_rr()`, while the issue in CVE-2023-27585 is in `parse_query()`. A patch is available in the `master` branch of the `pjsip/pjproject` GitHub repository. A workaround is to disable DNS resolution in PJSIP config (by setting `nameserver_count` to zero) or use an external resolver instead.

CVSS 3.1 · 7.5 High EPSS 2.2% KEV · Not listed
Vendors
Debian Pjsip
Products
Debian Linux Pjsip
CVE-2022-23547

Heap buffer overflow in pjproject when decoding STUN message

PJSIP is a free and open source multimedia communication library written in C language implementing standard based protocols such as SIP, SDP, RTP, STUN, TURN, and ICE. This issue is similar to GHSA-9pfh-r8x4-w26w. Possible buffer overread when parsing a certain STUN message. The vulnerability affects applications that uses STUN including PJNATH and PJSUA-LIB. The patch is available as commit in the master branch.

CVSS 3.1 · 6.5 Medium EPSS 1.0% KEV · Not listed
Vendors
Pjsip
Products
Pjsip