CVE-2023-47106

Name: CVE-2023-47106
Creator: NVD / NIST
Published: 2023-12-04T21:15:33.6+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.63%

Last modified Jun 17, 2026

CVE-2023-47106 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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. EPSS estimates a 0.63% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

6.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

EPSS Probability

0.63%

45.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions	Update
Traefik	Traefik	<= 2.10.5	—
Traefik	Traefik	3.0.0	Beta1

References

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
https://github.com/traefik/traefik/security/advisories/GHSA-fvhj-4qfh-q2hmExploit, Third Party Advisory
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
https://github.com/traefik/traefik/security/advisories/GHSA-fvhj-4qfh-q2hmExploit, Third Party Advisory

Timeline

Published: Dec 4, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-47106?

How severe is CVE-2023-47106?

CVE-2023-47106 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.63% probability of exploitation in the next 30 days.

How do I fix CVE-2023-47106?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-47106?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST