CVE-2026-90780

HIGH 7.5

SIPp through 3.7.7 Buffer Overflow via Oversized SIP Header Content

CVSS Score

7.5

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-120
Vendor	sipp
Product	sipp
Published	Sep 13, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Affected Versions

SIPp / sipp

0 ≤ 3.7.7

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/SIPp/sipp/pull/881 github.com: https://github.com/SIPp/sipp/commit/8ddfb43359703e665041a955543e07f504f80232 github.com: https://github.com/SIPp/sipp/blob/v3.7.7/src/sip_parser.cpp#L164-L227 github.com: https://github.com/SIPp/sipp vulncheck.com: https://www.vulncheck.com/advisories/sipp-through-3.7.7-buffer-overflow-via-oversized-sip-header-content

Credits

🔍 Tristan Madani