CVE-2026-67309

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5%, top 60% 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).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Traefik versions >= v3.7.0 and <= v3.7.7 contain a path traversal vulnerability in the Kubernetes Ingress NGINX provider's RewriteTarget middleware (generated from the nginx.ingress.kubernetes.io/rewrite-target annotation). When an Ingress path uses a regex that captures attacker-controlled text without requiring a path separator (e.g., path /api(.*) with rewrite target /$1), a crafted request such as /api../admin matches the public router, is rewritten to a dot-segment traversal path (/../admin), and is forwarded without post-replacement normalization validation. A backend that normalizes dot segments resolves the path to a protected endpoint (e.g., /admin) reachable only through a separate router secured with BasicAuth, DigestAuth, or ForwardAuth, resulting in route-level authentication bypass. The issue is fixed in v3.7.8.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
50(Track)
EG Risk 50/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity78% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
40%
KEV
Not listed

Published

August 1, 2026

Last Modified

August 3, 2026

Advisory Details (3)

Auto-updated Aug 1, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_commit.
generic

Traefik v3.7.0 Path Traversal via RewriteTarget Authentication Bypass | Advisories | VulnCheck

https://www.vulncheck.com/advisories/traefik-path-traversal-via-rewritetarget-authentication-bypass
github_commit

commit 69259c3acc9d (traefik/traefik)

Fix landed in traefik/traefik commit 69259c3acc9d — awaiting tagged release

https://github.com/traefik/traefik/commit/69259c3acc9d4bdc065cb2e3b83336f7de3e7038
github Patch Available🟡 PoC Available

Kubernetes Ingress NGINX RewriteTarget Path Traversal Allows Route-Level Authentication Bypass · Advisory · traefik/traefik · GitHub

https://github.com/traefik/traefik/security/advisories/GHSA-8rxv-jg7p-wvg3

Vendor Advisories for CVE-2026-67309(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
Go(1)
PackageVulnerable rangeFixed inDependents
github.com/traefik/traefik/v3—3.7.8—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 14× in last 7d / 52× 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.

  1. 2026-08-21 04:11 UTCEG score recompute
  2. 2026-08-20 22:56 UTCEPSS rescore
  3. 2026-08-20 02:50 UTCEG score recompute
  4. 2026-08-19 17:04 UTCEPSS rescore
  5. 2026-08-19 01:30 UTCEG score recompute
  6. 2026-08-18 13:48 UTCEPSS rescore
  7. 2026-08-17 23:21 UTCEG score recompute
  8. 2026-08-17 13:47 UTCEPSS rescore
  9. 2026-08-16 22:03 UTCEG score recompute
  10. 2026-08-16 14:56 UTCEPSS rescore
  11. 2026-08-16 09:23 UTCEG score recompute
  12. 2026-08-15 08:06 UTCEG score recompute
  13. 2026-08-15 01:30 UTCEPSS rescore
  14. 2026-08-14 06:47 UTCEG score recompute
  15. 2026-08-13 22:00 UTCEPSS rescore
  16. 2026-08-12 16:51 UTCEG score recompute
  17. 2026-08-12 13:51 UTCEPSS rescore
  18. 2026-08-11 15:32 UTCEG score recompute
  19. 2026-08-11 02:53 UTCEG score recompute
  20. 2026-08-11 00:00 UTCEPSS rescore
  21. 2026-08-10 01:34 UTCEG score recompute
  22. 2026-08-09 13:47 UTCEPSS rescore
  23. 2026-08-07 22:58 UTCEG score recompute
  24. 2026-08-06 21:40 UTCEG score recompute
  25. 2026-08-06 13:47 UTCEPSS rescore
Show 27 more
  1. 2026-08-06 09:01 UTCGHSA enrichment
  2. 2026-08-05 20:22 UTCEG score recompute
  3. 2026-08-05 20:22 UTCGHSA enrichment
  4. 2026-08-05 19:17 UTCEPSS rescore
  5. 2026-08-05 19:17 UTCEPSS rescore
  6. 2026-08-05 07:43 UTCGHSA enrichment
  7. 2026-08-04 19:03 UTCEG score recompute
  8. 2026-08-04 19:03 UTCGHSA enrichment
  9. 2026-08-04 15:10 UTCEPSS rescore
  10. 2026-08-04 10:39 UTCEPSS rescore
  11. 2026-08-04 06:23 UTCGHSA enrichment
  12. 2026-08-03 17:40 UTCEG score recompute
  13. 2026-08-03 17:40 UTCGHSA enrichment
  14. 2026-08-03 16:19 UTCEG score recompute
  15. 2026-08-03 16:19 UTCGHSA enrichment
  16. 2026-08-03 13:47 UTCEG score recompute
  17. 2026-08-03 13:47 UTCGHSA enrichment
  18. 2026-08-03 10:36 UTCEPSS rescore
  19. 2026-08-03 01:08 UTCGHSA enrichment
  20. 2026-08-02 12:29 UTCEG score recompute
  21. 2026-08-02 12:29 UTCGHSA enrichment
  22. 2026-08-02 12:15 UTCEG score recompute
  23. 2026-08-02 12:15 UTCGHSA enrichment
  24. 2026-08-02 01:57 UTCGHSA enrichment
  25. 2026-08-01 13:18 UTCEG score recompute
  26. 2026-08-01 12:43 UTCEG score recompute
  27. 2026-08-01 12:42 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-67309?
CVE-2026-67309 is a high vulnerability published on August 1, 2026. Traefik versions >= v3.7.0 and <= v3.7.7 contain a path traversal vulnerability in the Kubernetes Ingress NGINX provider's RewriteTarget middleware (generated from the nginx.ingress.kubernetes.io/rewrite-target annotation). When an Ingress path uses a regex that captures attacker-controlled text…
When was CVE-2026-67309 disclosed?
CVE-2026-67309 was first published in the National Vulnerability Database on August 1, 2026, with the most recent update on August 3, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-67309 actively exploited?
CVE-2026-67309 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 59.7% of all scored CVEs.
What is the CVSS score of CVE-2026-67309?
CVE-2026-67309 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-67309?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-67309, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-67309

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