What’s Vulnerable › Vulnerabilities

CVE-2026-90780: SIPp through 3.7.7 Buffer Overflow via Oversized SIP Header Content

• 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 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.

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#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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