NULL pointer dereference in Traefik - CVE-2026-27141
Published: May 5, 2026
Vulnerability identifier: #VU129667
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-27141
CWE-ID: CWE-476
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Containous
Affected software:
Traefik
Traefik
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to a null pointer dereference in the HTTP/2 handling component when processing HTTP/2 frames. A remote attacker can send specially crafted HTTP/2 frames to cause a denial of service.
How to mitigate CVE-2026-27141
Install security update from vendor's website.