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CVE-2026-119573medium4.4

Traefik 3.7.11 before 3.7.15 Cross-Namespace Authorization Bypass via auth-tls-secret

Impact

Traefik versions 3.7.11 before 3.7.15 contain an authorization bypass vulnerability, allowing users who can create Ingresses to reference another namespace's CA secret. This occurs when a cached client authentication TLS option is reused, skipping the cross-namespace check. Users can learn if a secret exists without disclosing its contents.

Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.

Affected packages

This source has no supported package-version data for matching. You can read the advisory here, but this record alone cannot power a dependency check.

Affected products

Vendor version evidence. Product records are separate from automatic dependency matching.

traefik · VulnCheck

traefik

2 ranges
VulnCheck version evidence

Package identity

pkg:golang/github.com/traefik/traefik/v3Explore github.com/traefik/traefik/v3 →

Identity supplied by VulnCheck. Version matching requires compatible range evidence.

Compare with this publisher’s ranges. This does not inspect your installation.

affected

3.7.11 → before 3.7.15

semver versions

unaffected

3.7.15

semver versions

unknown

Other versions: unaffected

Original source description

Traefik 3.7.11 before 3.7.15 contains an authorization bypass in the Kubernetes Ingress NGINX provider that skips the cross-namespace check on the auth-tls-secret annotation when a cached client authentication TLS option is reused. Users who can create Ingresses can reference another namespace's CA secret already used by another Ingress, enforcing it on their own routes and learning whether it exists, without disclosure of its contents.

Inside the record

Evidence available

Package identity
Version evidence
Remediation guidance · not supplied
Weakness classification
Additional publishers

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-119573

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Underlying weaknesses

The source’s classification of what caused the vulnerability.

CWE-863 ↗

Incorrect Authorization

VulnCheck

Related →

Environment requirements

These conditions apply together as specified by the publisher. A matching product name alone does not establish exposure.

VulnCheck · platform conditions

Any condition may hold

Vulnerable product

cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:*

From (inclusive): 3.7.11

Before: 3.7.15

Original applicability statements
[
  {
    "nodes": [
      {
        "operator": "OR",
        "negate": false,
        "cpeMatch": [
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "3.7.11",
            "versionEndExcluding": "3.7.15"
          }
        ]
      }
    ]
  }
]
Contributing organizations · 2
VulnCheck

Assigning organization

2026-10-30
CISA-ADP

Additional data publisher

2026-10-30

What changed

Follow changes
  1. CVE · CVE-2026-119573

    Observed 2026-10-30T15:58:29.680Z · upstream updated 2026-10-30T15:53:49.154Z

    Prioritization updated

    before

    []

    after

    [
  {
    "source": "CISA-ADP",
    "type": "SSVC",
    "role": "CISA Coordinator",
    "timestamp": "2026-10-30T15:21:12.918975Z",
    "decisions": [
      {
        "name": "Exploitation",
        "value": "none"
      },
      {
        "name": "Automatable",
        "value": "no"
      },
      {
        "name": "Technical Impact",
        "value": "partial"
      }
    ]
  }
]

Large field values are marked as truncated previews. Original source snapshots remain retained.

Showing up to 50 most recent observed changes.

References

2 sources
github.com/traefik/traefik/security/advisories/GHSA-28hp-c82p-8vqj
vendor-advisoryVulnCheck
www.vulncheck.com/advisories/traefik-3.7.11-before-3.7.15-cross-namespace-authorization-bypass-via-auth-tls-secret
third-party-advisoryVulnCheck