CVE-2026-90778 SIPp through 3.7.7 Buffer Overflow via SIP To Header Tag
Unauthenticated remote attackers can crash the SIPp process by sending crafted SIP messages with oversized To header tags.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-90778?
CVE-2026-90778 is a high-severity memory corruption vulnerability in sipp, published on 13 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-120
Which versions are affected by CVE-2026-90778?
How do I fix CVE-2026-90778?
No fix has been published for CVE-2026-90778 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-90778 being exploited?
There is no known exploitation of CVE-2026-90778 in the wild and no public exploit code.
Sources
Also known as GHSA-w99r-9mmj-g2pr.