Quick answers
- Is CVE-2026-90780 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-90780 being exploited in the wild.
- How severe is CVE-2026-90780?
- High severity, with a CVSS score of 7.5, published 13 September 2026.
- Which products and versions are affected?
- SIPp through 3.7.7.
- Is there a fix for CVE-2026-90780?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-90780 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-90780?
- Check whether you run SIPp at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A stack-based buffer overflow exists in the get_header() function in src/sip_parser.cpp when processing SIP messages with headers exceeding 20,490 bytes. The vulnerable code uses a fixed-size static buffer without proper bounds checking. An unauthenticated remote attacker on the network can send a crafted SIP message with an oversized header to overflow this buffer, crashing the SIPp process. This is a network-reachable, pre-authentication vulnerability; no user interaction or authentication is required. The primary impact is denial of service through process termination.
Affected products
- SIPp SIPp through 3.7.7
Timeline
- 2026-09-13: disclosed