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.
CVE-2023-47106
This medium-severity CVE scores 4.8 under NVD CVSS v3. EPSS exploit probability: 0.1%, top 68% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
- Lower severity and no public exploit yet
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 6.5
- EG Score
- 4.8(medium)
- EPSS
- 46.3%
- KEV
- Not listed
Published
December 4, 2023
Last Modified
June 17, 2026
References (8)
- security-advisories@githubhttps://datatracker.ietf.org/doc/html/rfc7230#section-5.3.1
- security-advisories@githubhttps://github.com/traefik/traefik/releases/tag/v2.10.6
- security-advisories@githubhttps://github.com/traefik/traefik/releases/tag/v3.0.0-beta5
- security-advisories@githubhttps://github.com/traefik/traefik/security/advisories/GHSA-fvhj-4qfh-q2hm
- af854a3a-2127-422b-91ae-364da2661108https://datatracker.ietf.org/doc/html/rfc7230#section-5.3.1
- af854a3a-2127-422b-91ae-364da2661108https://github.com/traefik/traefik/releases/tag/v2.10.6
- af854a3a-2127-422b-91ae-364da2661108https://github.com/traefik/traefik/releases/tag/v3.0.0-beta5
- af854a3a-2127-422b-91ae-364da2661108https://github.com/traefik/traefik/security/advisories/GHSA-fvhj-4qfh-q2hm
Affected Packages
(3 across 1 ecosystem)
Go(3)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| github.com/traefik/traefik | — | — | — |
| github.com/traefik/traefik/v2 | — | 2.10.6 | — |
| github.com/traefik/traefik/v3 | — | 3.0.0-beta5 | — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 10× in last 7d / 48× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
Showing the most recent 100 of 102 total refreshes for this CVE.
- 2026-07-22 14:06 UTCEPSS rescore
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- 2026-07-15 02:19 UTCOSV refresh
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- 2026-07-06 16:26 UTCEPSS rescore
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- 2026-06-24 06:32 UTCNVD updateCVSS v3 → 6.5
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- 2026-06-09 13:47 UTCOSV refresh
- 2026-06-08 14:16 UTCEPSS rescore
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Frequently asked(5)
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Dependency Blast Radius
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