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CVSS 9.1 · CRITICAL

CVE-2026-41415

PJSIP is a free and open source multimedia communication library written in C. In 2.16 and earlier, there is an out-of-bounds read when parsing a malformed Content-ID URI in SIP multipart message body. Insufficient length validation can cause reads beyond the intended buffer bounds. This vulnerability is fixed in 2.17.

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Analysis

PJSIP is a fundamental C library for VoIP and SIP communication used by major projects like Asterisk and FreePBX. A critical out-of-bounds read in the message parser represents a significant risk to communication infrastructure. The CVSS 9.1 score and the nature of SIP message handling make this a high-priority update for anyone managing telephony servers or building SIP-based apps.

Severity

Score: 9.1(CRITICAL)
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
AV: NETWORK
AC: LOW
PR: NONE
UI: NONE
S: UNCHANGED
C: HIGH
I: NONE
A: HIGH
Weakness (CWE): CWE-125

EPSS

Probability of exploitation (next 30 days): 0.0006 (0.1%)
Percentile: 17.3%
EPSS: 2026-05-06

Affects

teluu:pjsip

Technical description

PJSIP is a free and open source multimedia communication library written in C. In 2.16 and earlier, there is an out-of-bounds read when parsing a malformed Content-ID URI in SIP multipart message body. Insufficient length validation can cause reads beyond the intended buffer bounds. This vulnerability is fixed in 2.17.

Published: 4/24/2026, 7:17:13 PM
Last modified: 4/28/2026, 6:30:54 PM

References

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