CVE-2026-1788 Buffer Overflow in Xquic Server
An out-of-bounds write in the Xquic Server packet processing module allows attackers to execute arbitrary code or cause denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-1788?
CVE-2026-1788 is a medium-severity memory corruption vulnerability in Xquic Server, published on 3 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
: Out-of-bounds Write vulnerability in Xquic Project Xquic Server xquic on Linux (QUIC protocol implementation, packet processing module modules) allows : Buffer Manipulation.This issue affects Xquic Server: through 1.8.3.
Weakness: CWE-787
Which versions are affected by CVE-2026-1788?
How do I fix CVE-2026-1788?
Upgrade to a fixed version.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-1788 being exploited?
There is no known exploitation of CVE-2026-1788 in the wild and no public exploit code.
Sources
Also known as GHSA-xccv-2cc3-7px5, ROOT-OS-UBUNTU-2204-CVE-2026-1788.