What’s Vulnerable › Vulnerabilities

CVE-2026-90558: sngrep through 1.8.4 Stack Buffer Overflow via SIP Headers

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-12 · updated 2026-09-23
• Weakness: CWE-121

Description

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.

Affected products

• irontec sngrep: through 1.8.4

References

• 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

Get alerted when CVE-2026-90558 or the next vulnerability affects your stack