CVE-2026-90558CWE-121

CVE-2026-90558

Critical · published September 12, 2026

CVSS v3.1
9.8
EPSS
1%
Percentile
58.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
9.3 · 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
EPSS
0.00879 · 58.7th percentile
Weakness
CWE-121 · Stack-based Buffer Overflow
Published
2026-09-12T22:16Z
References (5)
https://github.com/irontec/sngrep · [email protected]https://github.com/irontec/sngrep/blob/v1.8.4/src/sip_call.c#L260 · [email protected]https://github.com/irontec/sngrep/blob/v1.8.4/src/sip_msg.c#L150 · [email protected]https://github.com/irontec/sngrep/commit/1ff74ee3ab5ff280e8ba976aa8c744dca57eb35b · [email protected]https://www.vulncheck.com/advisories/sngrep-through-1.8.4-stack-buffer-overflow-via-sip-headers · [email protected]
EPSS history
Timeline
  • 15 SEP 03:22Z
    EPSS moved — → 1%
    epss
  • 12 SEP 18:06Z
    sngrep through 1.8.4 Stack Buffer Overflow via SIP Headers
    cvelistv5