CVE-2026-65600: Traefik before v2.11.52 Authentication Bypass via ReplacePathRegex
Vendor fix available · Affected: traefik · Exploitation: check available, not yet exploited
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 43% of scored CVEs
DescriptionCVE.org
Traefik versions <= v2.11.51, >= v3.6.0 <= v3.6.22, and >= v3.7.0 <= v3.7.6 contain an authentication bypass via path traversal in the ReplacePathRegex middleware. When ReplacePathRegex is configured with a regex that captures user-controlled path segments without a mandatory path separator (e.g. regex "^/api(.*)", replacement "/$1"), the middleware forwards the replaced path to the backend without validating that it matches its normalized form. An unauthenticated remote attacker can send a crafted request (e.g. GET /api../admin) that produces an un-normalized path such as /../admin, which a backend that normalizes paths resolves to a protected route, bypassing authentication middleware. Fixed in v2.11.52, v3.6.23, and v3.7.7.
Affected products3
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- traefik · traefikbefore 2.11.52
- traefik · traefikfrom 3.6.0 before 3.6.23
- traefik · traefikfrom 3.7.0 before 3.7.7
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Check available, not yet exploited. A public nuclei template can confirm it on a system you are authorised to test.
- CISA KEV
- Not listed
- Public check
- Traefik - Authentication Bypass - Version Detection · nuclei template in projectdiscovery/nuclei-templates
- Vendor
- traefik
- Published
- July 2026
CoverageNo articles yet
No CyberSIXT article names CVE-2026-65600 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.