Traefik is an open source HTTP reverse proxy and load balancer. Prior to 2.11.57, and 3.7.13, Traefik accepts a rootless HTTP/1 request target that Go stores in URL.Opaque while leaving URL.Path empty. The rewriteRequestBuilder path evaluates routing, path sanitization, forwardAuth, encodedCharacters, and access logging against a path normalized to / but forwards URL.Opaque verbatim to the backend, allowing cross-vhost routing bypass, path-scoped authorization bypass, and access-log evasion when the backend interprets the opaque target as a path.
This issue is fixed in 2.11.57 and 3.7.13.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
Low
Partial data modification
Availability
None
No disruption
CVSS Vector v4.0
Vulnerable Products 2
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Traefik Traefik
cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:*
|
— |
2.11.57
|
|
Traefik Traefik
cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:*
|
3.0.0
|
3.7.13
|
References 5
https://github.com/traefik/traefik/commit/58d1e9ca204526823211e30fd4634101c59d5…
security-advisories@github.com
https://github.com/traefik/traefik/pull/13796
security-advisories@github.com
https://github.com/traefik/traefik/releases/tag/v2.11.57
security-advisories@github.com
https://github.com/traefik/traefik/releases/tag/v3.7.13
security-advisories@github.com
https://github.com/traefik/traefik/security/advisories/GHSA-f52w-8j3h-j724
security-advisories@github.com