Home/CVE/Traefik is an open source HTTP reverse proxy and load balancer. When a request is sent to Traefik with a URL fragment, T
CVE

CVE-2023-47106

Traefik is an open source HTTP reverse proxy and load balancer. When a request is sent to Traefik with a URL fragment, T

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.

MEDIUM · CVSS 4.8 EPSS 0.00128
Schedule remediation
  • Public exploit or PoC is available
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-20Improper Input Validation
▤

Affected Products & Versions

2
traefik<= 2.10.5
traefikall versions
▤

Affected Packages

3
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
Go github.com/traefik/traefik
Go github.com/traefik/traefik/v2 MODERATE fixed in 2.10.6
Go github.com/traefik/traefik/v3 MODERATE fixed in 3.0.0-beta5
⚠

Public Exploits & PoCs

1
pocgithub.com · GHSA-fvhj-4qfh-q2hmgithub.com
▣

Scoring & Timeline

4.8
MEDIUM · CVSS v3.1 · security-advisories@github.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD04 Dec 2023 · 09:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
⚑

Vendor Advisories

2
suse-csafopenSUSE-SU-2024:14076-1
suse-csafopenSUSE-SU-2024:13506-1
🔗

References & Sources

3
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://datatracker.ietf.org/doc/html/rfc7230#section-5.3.1Not Applicable
https://github.com/traefik/traefik/releases/tag/v2.10.6Release Notes
https://github.com/traefik/traefik/releases/tag/v3.0.0-beta5Release Notes
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