CVSS 3.1
6.5 mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:NCVE-2023-47106
Medium (6.5) in traefik traefik. EPSS 0.6% chance of exploitation in the next 30 days. Fixed in github.com/traefik/traefik/v2 2.10.6.
Traefik is an open source HTTP reverse proxy and load balancer. When a request is sent to Traefik with a URL fragment, Traefik automatically URL encodes and forwards the fragment to the backend server. This violates RFC 7230 because in the origin-form the URL should only contain the absolute path and the query. When this is combined with another frontend proxy like Nginx, it can be used to bypass frontend proxy URI-based access control restrictions. This vulnerability has been addressed in versions 2.10.6 and 3.0.0-beta5. Users are advised to upgrade. There are no known workarounds for this vulnerability.
Severity
- EPSS
- 0.6% chance of exploitation in the next 30 days; higher than 50% of CVEs (scores of 2026-10-31)
- CWE
- CWE-20
- Published
- Modified
- Record from
- the NVD, synced
Affected
- traefik:traefik
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-fvhj-4qfh-q2hm | Go | github.com/traefik/traefik/v2 | <2.10.6 | 2.10.6 |
| GHSA-fvhj-4qfh-q2hm | Go | github.com/traefik/traefik/v3 | <3.0.0-beta5 | 3.0.0-beta5 |
| GO-2023-2376 | Go | github.com/traefik/traefik | all versions | no fix published |
| GO-2023-2376 | Go | github.com/traefik/traefik/v2 | <2.10.6 | 2.10.6 |
| GO-2023-2376 | Go | github.com/traefik/traefik/v3 | <3.0.0-beta5 | 3.0.0-beta5 |
References
- https://datatracker.ietf.org/doc/html/rfc7230#section-5.3.1
- https://github.com/traefik/traefik/releases/tag/v2.10.6
- https://github.com/traefik/traefik/releases/tag/v3.0.0-beta5
- https://github.com/traefik/traefik/security/advisories/GHSA-fvhj-4qfh-q2hm
- https://datatracker.ietf.org/doc/html/rfc7230#section-5.3.1