What’s Vulnerable › Vulnerabilities

CVE-2026-90778: SIPp through 3.7.7 Buffer Overflow via SIP To Header Tag

• Severity: high (CVSS 7.5 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: 2026-09-13 · updated 2026-09-23
• Weakness: CWE-120

Description

SIPp through 3.7.7 contains a buffer overflow vulnerability in get_peer_tag() function when processing SIP To headers with tag parameters of 2049 bytes or more. Unauthenticated remote attackers can send crafted SIP messages with oversized tag parameters to overflow the static buffer and crash the process.

Affected products

• sipp: through 3.7.7

References

• https://github.com/SIPp/sipp
• https://github.com/SIPp/sipp/blob/v3.7.7/src/sip_parser.cpp#L76-L113
• https://github.com/SIPp/sipp/commit/ddf22d1a54e0396b2e18ebaf4cf5a3fa860e5da4
• https://github.com/SIPp/sipp/pull/879
• https://www.vulncheck.com/advisories/sipp-through-3.7.7-buffer-overflow-via-sip-to-header-tag

Get alerted when CVE-2026-90778 or the next vulnerability affects your stack