Vulnerability-Lookup

OPENSUSE-SU-2026:10020-1

Vulnerability from csaf_opensuse - Published: 2026-01-08 00:00 - Updated: 2026-01-08 00:00

Summary

traefik-3.6.6-1.1 on GA media

Notes

Title of the patch

traefik-3.6.6-1.1 on GA media

Description of the patch

These are all security issues fixed in the traefik-3.6.6-1.1 package on the GA media of openSUSE Tumbleweed.

Patchnames

openSUSE-Tumbleweed-2026-10020

CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).

JSON

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}

CVE-2025-66490 (GCVE-0-2025-66490)

Vulnerability from cvelistv5 – Published: 2025-12-09 00:35 – Updated: 2025-12-09 16:03

Title

Traefik doesn't Prevent Path Normalization Bypass in Router + Middleware Rules

Summary

Traefik is an HTTP reverse proxy and load balancer. For versions prior to 2.11.32 and 2.11.31 through 3.6.2, requests using PathPrefix, Path or PathRegex matchers can bypass path normalization. When Traefik uses path-based routing, requests containing URL-encoded restricted characters (/, \, Null, ;, ?, #) can bypass the middleware chain and reach unintended backends. For example, a request to http://mydomain.example.com/admin%2F could reach service-a without triggering my-security-middleware, bypassing security controls for the /admin/ path. This issue is fixed in versions 2.11.32 and 3.6.3.

Severity ?

6.9 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

CWE

CWE-436 - Interpretation Conflict

Assigner

GitHub_M

References

URL

Tags

	https://github.com/traefik/traefik/security/advis…	x_refsource_CONFIRM
	https://github.com/traefik/traefik/releases/tag/v…	x_refsource_MISC
	https://github.com/traefik/traefik/releases/tag/v3.6.4	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	traefik	traefik	Affected: github.com/traefik/traefik/v3 < 3.6.3 Affected: github.com/traefik/traefik/v2 < 2.11.32 Affected: github.com/traefik/traefik <= 1.7.34

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-66490",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-12-09T14:17:38.617610Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-12-09T16:03:33.572Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/traefik/traefik/security/advisories/GHSA-gm3x-23wp-hc2c"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "traefik",
          "vendor": "traefik",
          "versions": [
            {
              "status": "affected",
              "version": "github.com/traefik/traefik/v3  \u003c 3.6.3"
            },
            {
              "status": "affected",
              "version": "github.com/traefik/traefik/v2 \u003c 2.11.32"
            },
            {
              "status": "affected",
              "version": "github.com/traefik/traefik \u003c= 1.7.34"
            }
          ]
        }
      ],
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        {
          "lang": "en",
          "value": "Traefik is an HTTP reverse proxy and load balancer. For versions prior to 2.11.32 and 2.11.31 through 3.6.2, requests using PathPrefix, Path or PathRegex matchers can bypass path normalization. When Traefik uses path-based routing, requests containing URL-encoded restricted characters (/, \\, Null, ;, ?, #) can bypass the middleware chain and reach unintended backends. For example, a request to http://mydomain.example.com/admin%2F could reach service-a without triggering my-security-middleware, bypassing security controls for the /admin/ path. This issue is fixed in versions 2.11.32 and 3.6.3."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 6.9,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "LOW",
            "subIntegrityImpact": "LOW",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-436",
              "description": "CWE-436: Interpretation Conflict",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-09T00:35:26.530Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/traefik/traefik/security/advisories/GHSA-gm3x-23wp-hc2c",
          "tags": [
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          ],
          "url": "https://github.com/traefik/traefik/security/advisories/GHSA-gm3x-23wp-hc2c"
        },
        {
          "name": "https://github.com/traefik/traefik/releases/tag/v2.11.32",
          "tags": [
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          "url": "https://github.com/traefik/traefik/releases/tag/v2.11.32"
        },
        {
          "name": "https://github.com/traefik/traefik/releases/tag/v3.6.4",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/traefik/traefik/releases/tag/v3.6.4"
        }
      ],
      "source": {
        "advisory": "GHSA-gm3x-23wp-hc2c",
        "discovery": "UNKNOWN"
      },
      "title": "Traefik doesn\u0027t Prevent Path Normalization Bypass in Router + Middleware Rules"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2025-66490",
    "datePublished": "2025-12-09T00:35:26.530Z",
    "dateReserved": "2025-12-02T22:44:04.707Z",
    "dateUpdated": "2025-12-09T16:03:33.572Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2025-66491 (GCVE-0-2025-66491)

Vulnerability from cvelistv5 – Published: 2025-12-09 00:38 – Updated: 2025-12-09 16:03

Title

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

Summary

Traefik is an HTTP reverse proxy and load balancer. Versions 3.5.0 through 3.6.2 have inverted TLS verification logic in the nginx.ingress.kubernetes.io/proxy-ssl-verify annotation. Setting the annotation to "on" (intending to enable backend TLS certificate verification) actually disables verification, allowing man-in-the-middle attacks against HTTPS backends when operators believe they are protected. This issue is fixed in version 3.6.3.

Severity ?

5.9 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

CWE

CWE-295 - Improper Certificate Validation

Assigner

GitHub_M

References

URL

	Vendor	Product	Version
	traefik	traefik	Affected: >= 3.5.0, < 3.6.3

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

OPENSUSE-SU-2026:10020-1

CVE-2025-66490 (GCVE-0-2025-66490)

CVE-2025-66491 (GCVE-0-2025-66491)

Tags

Sightings

Nomenclature