CVE-2026-76989 liftoff-sr CIPster TCP Encapsulation Receive Path encap.cc out-of-bounds
Remote attackers can trigger an out-of-bounds read in the CIPster TCP encapsulation receive path, potentially exposing memory or causing crashes.
- 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-2026-76989?
CVE-2026-76989 is a medium-severity memory corruption vulnerability in liftoff-sr CIPster, published on 20 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A security vulnerability has been detected in liftoff-sr CIPster 1802525be27d33e19a9a83c163e331a1d13b1892. This impacts an unknown function of the file source/src/enet_encap/encap.cc of the component TCP Encapsulation Receive Path. The manipulation leads to out-of-bounds read. The attack can be initiated remotely. The exploit has been disclosed publicly and may be used. The identifier of the patch is e8e9dba09bf56962807d3504b783ccdb6287f3e4. To fix this issue, it is recommended to deploy a patch.
Which versions are affected by CVE-2026-76989?
How do I fix CVE-2026-76989?
No fix has been published for CVE-2026-76989 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-2026-76989 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-76989 exists.
Sources
Also known as GHSA-q8vh-mhmw-wmcq.