CVE-2025-66491Published

Traefik has Inverted TLS Verification Logic in its ingress-nginx Provider

cve-program · CVE-2025-66491

Published

traefik

Vendor product

Original vendor version evidence · not evaluated as a NuGet range

{
                    "vendor": "traefik",
                    "product": "traefik",
                    "versions": [
                        {
                            "version": ">= 3.5.0, < 3.6.3",
                            "status": "affected"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON

euvd · EUVD-2025-201730

Published

EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.

Original publisher date fields

datePublished: Dec 9, 2025, 12:38:39 AM

dateUpdated: Dec 9, 2025, 4:03:28 PM

1 related source bulletins · separate from aliases

openSUSE-SU-2026:10020-1: traefik-3.6.6-1.1 on GA media

CVE-2025-66490 · CVE-2025-66491

No normalized affected-package data is projected for this source revision. The original publisher record may contain additional product and version evidence; this does not establish that a package is unaffected.

Original source record · Cite this exact observation · Complete original publisher JSON

nvd · CVE-2025-66491

Published

NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.

Source analysis status: Analyzed

Weakness classifications: CWE-295

Original publisher date fields

published: 2025-12-09T01:16:55.720

lastModified: 2026-10-14T22:10:00.210

1 source CPE criteria · context only

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

The original JSON retains the logical configuration operators, exclusions and version bounds.

Original source record · Cite this exact observation · Complete original publisher JSON

osv · GHSA-7vww-mvcr-x6vj

Published

github.com/traefik/traefik/v3

SEMVER · introduced 3.5.0 → fixed 3.6.3

Original source record · Cite this exact observation · Complete original publisher JSON

osv · GO-2025-4205

Published

github.com/traefik/traefik

SEMVER · introduced 0

github.com/traefik/traefik/v2

SEMVER · introduced 0

github.com/traefik/traefik/v3

SEMVER · introduced 3.5.0 → fixed 3.6.3

Original source record · Cite this exact observation · Complete original publisher JSON