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Vulnerability record · CVE-2026-90780 · published 13 September 2026

CVE-2026-90780: Classic buffer overflow vulnerability

SIPp through 3.7.7 contains a buffer overflow vulnerability in the get_header() function in src/sip_parser.cpp when processing SIP messages with header content exceeding 20,490 bytes. Unauthenticated remote attackers can send crafted SIP messages with oversized headers to overflow the static buffer and crash the process.

8.7 CVSS 4.0 High EPSS 0.86% · top 43.3% CWE-120 · Classic buffer overflow Deferred
8.7CVSS 4.0 base score
0.86%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
5References
23 Sep 2026Last modified by NVD

Description

SIPp through 3.7.7 contains a buffer overflow vulnerability in the get_header() function in src/sip_parser.cpp when processing SIP messages with header content exceeding 20,490 bytes. Unauthenticated remote attackers can send crafted SIP messages with oversized headers to overflow the static buffer and crash the process.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://github.com/SIPp/sipp
https://github.com/SIPp/sipp/blob/v3.7.7/src/sip_parser.cpp#L164-L227
https://github.com/SIPp/sipp/commit/8ddfb43359703e665041a955543e07f504f80232
https://github.com/SIPp/sipp/pull/881
https://www.vulncheck.com/advisories/sipp-through-3.7.7-buffer-overflow-via-oversized-sip-header-content

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Source: NIST National Vulnerability Database (record CVE-2026-90780), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.