GHSA-7qf5-7ppr-87v8: Duplicate Advisory Authentication Bypass Vulnerability

HIGH
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CWE-22
Published
Advisory Summary

GHSA-7qf5-7ppr-87v8 is a HIGH authentication bypass vulnerability (CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')) affecting Duplicate Advisory libraries in the Go ecosystem. The issue involves kubernetes ingress nginx rewritetarget path traversal allows route-level authentication bypass. Remediation is available in the latest vendor maintenance releases.

GHSA-7qf5-7ppr-87v8 at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-7qf5-7ppr-87v8
Severity HIGH
CVSS v3.1 Base Score N/A
CWE Classification CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Product Duplicate Advisory
Package Ecosystem Go
Published Date
Last Updated

How to Fix GHSA-7qf5-7ppr-87v8

To remediate this vulnerability, upgrade all affected Duplicate Advisory dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

github.com/traefik/traefik/v3 fixed: Latest secure release 
Upgrade github.com/traefik/traefik/v3 to Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for github.com/traefik/traefik/v3

How to Check if You Are Affected

To determine whether your application is affected by GHSA-7qf5-7ppr-87v8, inspect your project dependencies for Duplicate Advisory:

inspect dependencies for github.com/traefik/traefik/v3

Analyze the terminal output to locate any version of Duplicate Advisory in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'), where the product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. In Duplicate Advisory, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

## Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-8rxv-jg7p-wvg3. This link is maintained to preserve external references. ## Original Description 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.

GHSA-7qf5-7ppr-87v8 Affected Duplicate Advisory Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
github.com/traefik/traefik/v3
golang/github.com/traefik/traefik/v3
Go
≥ 3.7.0
≤ 3.7.7

References

GitHub Advisory / Wiki ADVISORY
https://github.com/traefik/traefik/security/advisories/GHSA-8rxv-jg7p-wvg3
NVD — GHSA-7qf5-7ppr-87v8 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-67309
Security Fix Commit FIX COMMIT
https://github.com/traefik/traefik/commit/69259c3acc9d4bdc065cb2e3b83336f7de3e7038
Security Fix Commit FIX COMMIT
https://github.com/traefik/traefik/commit/b93f02cd07b79490fb8c8f02e301a7a1ec553195
www.vulncheck.com/advisories/traefik-... WEB
https://www.vulncheck.com/advisories/traefik-path-traversal-via-rewritetarget-authentication-bypass

Frequently Asked Questions

What is GHSA-7qf5-7ppr-87v8?
GHSA-7qf5-7ppr-87v8 is a security vulnerability in Duplicate Advisory involving Kubernetes Ingress NGINX RewriteTarget Path Traversal Allows Route-Level Authentication Bypass under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal').
Which Duplicate Advisory versions are affected?
Affected versions include releases prior to current release patches across affected packages: github.com/traefik/traefik/v3.
What version fixes GHSA-7qf5-7ppr-87v8?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/traefik/traefik/v3 affected?
Yes, github.com/traefik/traefik/v3 is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What CWE is associated with GHSA-7qf5-7ppr-87v8?
GHSA-7qf5-7ppr-87v8 is classified under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') (The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.).
How can I check Go dependencies for GHSA-7qf5-7ppr-87v8?
Run the dependency tree command: 'inspect dependencies for github.com/traefik/traefik/v3'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-7qf5-7ppr-87v8",
  "modified" : "2026-08-06T16:45:13Z",
  "published" : "2026-08-01T15:30:27Z",
  "withdrawn" : "2026-08-06T16:45:13Z",
  "aliases" : [ ],
  "summary" : "Duplicate Advisory: Kubernetes Ingress NGINX RewriteTarget Path Traversal Allows Route-Level Authentication Bypass",
  "details" : "## Duplicate Advisory\n\nThis advisory has been withdrawn because it is a duplicate of GHSA-8rxv-jg7p-wvg3. This link is maintained to preserve external references.\n\n## Original Description\n\nTraefik 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.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/traefik/traefik/v3"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "3.7.0"
      }, {
        "last_affected" : "3.7.7"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/traefik/traefik/security/advisories/GHSA-8rxv-jg7p-wvg3"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-67309"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/traefik/traefik/commit/69259c3acc9d4bdc065cb2e3b83336f7de3e7038"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/traefik/traefik/commit/b93f02cd07b79490fb8c8f02e301a7a1ec553195"
  }, {
    "type" : "WEB",
    "url" : "https://www.vulncheck.com/advisories/traefik-path-traversal-via-rewritetarget-authentication-bypass"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-22" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-08-06T16:45:13Z",
    "nvd_published_at" : "2026-08-01T13:17:00Z"
  }
}