Back to Database
Status published
High
CVE-2024-39321
Traefik vulnerable to bypassing IP allow-lists via HTTP/3 early data requests in QUIC 0-RTT handshakes
Vulnerability Description
Traefik is an HTTP reverse proxy and load balancer. Versions prior to 2.11.6, 3.0.4, and 3.1.0-rc3 have a vulnerability that allows bypassing IP allow-lists via HTTP/3 early data requests in QUIC 0-RTT handshakes sent with spoofed IP addresses. Versions 2.11.6, 3.0.4, and 3.1.0-rc3 contain a patch for this issue. No known workarounds are available.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
THREAT MONITOR
Am I Vulnerable?
Launch our assessment wizard to check if your infrastructure is exposed to • CVE-2024-39321
Credits & Attribution
No credits recorded in the NVD database.
References
More from traefik
View All →CVE-2025-66491
Traefik has Inverted TLS Verification Logic in its ingress-nginx Provider
Medium
5.9
CVE-2025-66490
Traefik doesn't Prevent Path Normalization Bypass in Router + Middleware Rules
Medium
6.9
CVE-2025-54386
Traefik's Client Plugin is Vulnerable to Path Traversal, Arbitrary File Overwrites and Remote Code Execution
High
7.3
CVE-2025-47952
Traefik allows path traversal using url encoding
Low
2.9
CVE-2025-32431
Traefik has a possible vulnerability with the path matchers
High
8.8
Affected Vendor
traefik
View all reports →Affected Software
traefik
Vulnerable Versions:
< 2.11.6, >= 3.0.0-beta3, < 3.0.4, >= 3.1.0-rc1, < 3.1.0-rc3
Timeline
Official Publish:
July 5th, 2024
Last Modified:
August 2nd, 2024
Added to House:
July 22nd, 2026
CVSS Vectors
V3:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N