Vulnerability record · CVE-2026-90558 · published 12 September 2026

CVE-2026-90558: Stack-based buffer overflow vulnerability

sngrep through 1.8.4 contains stack buffer overflow vulnerabilities in SIP attribute formatting routines when header values exceed the 255-byte buffer limit. Attackers can craft malicious SIP packets with oversized Call-ID, X-Call-ID, or other header fields to overflow stack buffers and cause crashes or execute arbitrary code during packet parsing and rendering.

9.3 CVSS 4.0 Critical EPSS 0.88% · top 42.6% CWE-121 · Stack-based buffer overflow Deferred

9.3CVSS 4.0 base score

0.88%EPSS exploitation probability, 30 days

NoNot in CISA KEV

0Affected product versions listed by NVD

5References

23 Sep 2026Last modified by NVD

Description

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/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

Link	Tags
https://github.com/irontec/sngrep
https://github.com/irontec/sngrep/blob/v1.8.4/src/sip_call.c#L260
https://github.com/irontec/sngrep/blob/v1.8.4/src/sip_msg.c#L150
https://github.com/irontec/sngrep/commit/1ff74ee3ab5ff280e8ba976aa8c744dca57eb35b
https://www.vulncheck.com/advisories/sngrep-through-1.8.4-stack-buffer-overflow-via-sip-headers

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Source: NIST National Vulnerability Database (record CVE-2026-90558), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.