# CVE-2026-40614: PJSIP is a free and open source multimedia communication library written in C. In 2.16 and earlier, there is a buffer…

Source: https://junglewise.ai/threats/cve-2026-40614-pjsip-is-a-free-and-open-source-multimedia-communication-library  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-04-21  
License: CC BY 4.0 with a link back

CVE-2026-40614 · Severity: high · CVSS 8.8 · Published 2026-04-21

PJSIP is a free and open source multimedia communication library written in C. In 2.16 and earlier, there is a buffer overflow when decoding Opus audio frames due to insufficient buffer size validation in the Opus codec decode path. The FEC decode buffers (dec_frame[].buf) were allocated based on a PCM-derived formula: (sample_rate/1000) * 60 * channel_cnt * 2. At 8 kHz mono this yields only 960 bytes, but codec_parse() can output encoded frames up to MAX_ENCODED_PACKET_SIZE (1280) bytes via opus_repacketizer_out_range(). The three pj_memcpy() calls in codec_decode() copied input->size bytes without bounds checking, causing a heap buffer overflow.

Technologies: [PJSIP](https://junglewise.ai/threats/technologies/pjsip-pjsip). Vendors: [PJSIP](https://junglewise.ai/threats/vendors/pjsip).

## Quick answers

**Is CVE-2026-40614 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-40614 being exploited in the wild.

**How severe is CVE-2026-40614?** High severity, with a CVSS score of 8.8, published 21 April 2026.

**Which products and versions are affected?** PJSIP. The advisory does not name versions.

**Is there a fix for CVE-2026-40614?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**Am I affected by CVE-2026-40614?** Check whether you run PJSIP. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- PJSIP

## Related threats

- [PJSIP TLS server identity verification bypass via embedded NUL in certificate SubjectAltName](https://junglewise.ai/threats/cve-2026-84975-pjsip-is-a-free-and-open-source-multimedia-communication-library)
- [PJSIP heap buffer overflow in AVI parser](https://junglewise.ai/threats/cve-2026-77396-pjsip-is-a-free-and-open-source-multimedia-communication-library)
- [PJSIP is a free and open source multimedia communication library written in C. In 2.16 and earlier, a stack buffer…](https://junglewise.ai/threats/cve-2026-40892-pjsip-is-a-free-and-open-source-multimedia-communication-library)