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.
CVE-2026-65600
HIGHPre-NVD 7.87.8Trending — 3 sources updated this week
EchelonGraph scoreLOW confidence
This high-severity CVE scores 7.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit-prediction score not yet available (the EPSS model rescores nightly; freshly-published CVEs typically appear within 48 hours). 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).
Triggered by: NVD CVSS baseline
Sources: secondary
7.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: —CVSS: 7.8Exploit: NoneExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 7.8
- EG Score
- 7.8(low)
- EPSS
- —
- KEV
- Not listed
Published
July 22, 2026
Last Modified
July 22, 2026
Advisory Details (2)
Auto-updated Jul 22, 2026🔬 Proof of concept available. Patch available. Sources: github.
generic
Traefik before v2.11.52 Authentication Bypass via ReplacePathRegex | Advisories | VulnCheck
https://www.vulncheck.com/advisories/traefik-before-authentication-bypass-via-replacepathregexgithub Patch Available🟡 PoC Available
Authentication Bypass via Path Traversal in ReplacePathRegex Middleware · Advisory · traefik/traefik · GitHub
https://github.com/traefik/traefik/security/advisories/GHSA-cxjq-mrr5-89rvVendor Advisories for CVE-2026-65600(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 4× in last 7d / 4× 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.
- 2026-07-22 13:35 UTCEG score recompute
- 2026-07-22 13:35 UTCGHSA enrichment
- 2026-07-22 11:32 UTCEG score recompute
- 2026-07-22 11:32 UTCMITRE cvelistV5first tracked
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Same CWE
10 shownCWE-22
Frequently asked(4)
What is CVE-2026-65600?
CVE-2026-65600 is a high vulnerability published on July 22, 2026. 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.…
When was CVE-2026-65600 disclosed?
CVE-2026-65600 was first published in the National Vulnerability Database on July 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
What is the CVSS score of CVE-2026-65600?
CVE-2026-65600 has a CVSS v3 base score of 7.8 (NVD). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2026-65600?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-65600, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-65600
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