CVE-2026-6328 XQUIC Improper STREAM Frame Validation in Initial/Handshake Packets
Attackers can manipulate the QUIC protocol via improper stream frame validation in XQUIC, potentially disrupting communication integrity.
- 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-2026-6328?
CVE-2026-6328 is a high-severity vulnerability in XQUIC, published on 15 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Improper input validation, Improper verification of cryptographic signature vulnerability in XQUIC Project XQUIC xquic on Linux (QUIC protocol implementation, packet processing module, STREAM frame handler modules) allows Protocol Manipulation.This issue affects XQUIC: through 1.8.3.
Which versions are affected by CVE-2026-6328?
How do I fix CVE-2026-6328?
No fix has been published for CVE-2026-6328 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-6328 being exploited?
There is no known exploitation of CVE-2026-6328 in the wild and no public exploit code.
Sources
Also known as GHSA-89j2-h6hv-gvhg.