Vulnerability-Lookup

OPENSUSE-SU-2026:10714-1

Vulnerability from csaf_opensuse - Published: 2026-05-06 00:00 - Updated: 2026-09-17 17:03

Summary

traefik2-2.11.45-1.1 on GA media

Severity

Moderate

Notes

Title of the patch: traefik2-2.11.45-1.1 on GA media

Description of the patch: These are all security issues fixed in the traefik2-2.11.45-1.1 package on the GA media of openSUSE Tumbleweed.

Patchnames: openSUSE-Tumbleweed-2026-10714

CVE-2026-41181

5.8 (Medium)


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

Affected products

Recommended 4 products

Product	Version	Remediation
Unresolved product id: openSUSE Tumbleweed:traefik2-0:2.11.45-1.1.aarch64	—	Vendor Fix
Unresolved product id: openSUSE Tumbleweed:traefik2-0:2.11.45-1.1.ppc64le	—	Vendor Fix
Unresolved product id: openSUSE Tumbleweed:traefik2-0:2.11.45-1.1.s390x	—	Vendor Fix
Unresolved product id: openSUSE Tumbleweed:traefik2-0:2.11.45-1.1.x86_64	—	Vendor Fix

Threats

Impact moderate

References

5 references

URL	Category
https://www.suse.com/support/security/rating/	external
https://ftp.suse.com/pub/projects/security/csaf/o…	self
https://www.suse.com/security/cve/CVE-2026-41181/	self
https://www.suse.com/security/cve/CVE-2026-41181	external
https://bugzilla.suse.com/1265371	external

JSON

To clipboard

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      "text": "moderate"
    },
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    "distribution": {
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        "title": "Patchnames"
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                  "product_identification_helper": {
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                  }
                }
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            ],
            "category": "product_family",
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        ],
        "category": "vendor",
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      }
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    "relationships": [
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  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-41181",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2026-41181"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "Traefik is an HTTP reverse proxy and load balancer. Prior to 2.11.44, 3.6.15, and 3.7.0-rc.3, there is an information disclosure vulnerability in Traefik\u0027s errors (custom error pages) middleware. When the backend returns a response matching the configured status range, the middleware forwards the original request\u0027s complete header set, including Authorization, Cookie, and other authentication material, to the separate error page service rather than only the minimal context needed to render the error page. This behavior is undocumented: the documentation states only that Host is forwarded by default, so operators are not warned that sensitive credentials are shared across service boundaries. Deployments using the errors middleware with a distinct error page service may inadvertently expose end-user credentials to infrastructure that was not intended to receive them. This vulnerability is fixed in 2.11.44, 3.6.15, and 3.7.0-rc.3.",
          "title": "CVE description"
        }
      ],
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          "openSUSE Tumbleweed:traefik2-0:2.11.45-1.1.ppc64le",
          "openSUSE Tumbleweed:traefik2-0:2.11.45-1.1.s390x",
          "openSUSE Tumbleweed:traefik2-0:2.11.45-1.1.x86_64"
        ]
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          "url": "https://www.suse.com/security/cve/CVE-2026-41181"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1265371 for CVE-2026-41181",
          "url": "https://bugzilla.suse.com/1265371"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "openSUSE Tumbleweed:traefik2-0:2.11.45-1.1.aarch64",
            "openSUSE Tumbleweed:traefik2-0:2.11.45-1.1.ppc64le",
            "openSUSE Tumbleweed:traefik2-0:2.11.45-1.1.s390x",
            "openSUSE Tumbleweed:traefik2-0:2.11.45-1.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 5.8,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N",
            "version": "3.1"
          },
          "products": [
            "openSUSE Tumbleweed:traefik2-0:2.11.45-1.1.aarch64",
            "openSUSE Tumbleweed:traefik2-0:2.11.45-1.1.ppc64le",
            "openSUSE Tumbleweed:traefik2-0:2.11.45-1.1.s390x",
            "openSUSE Tumbleweed:traefik2-0:2.11.45-1.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-05-06T00:00:00Z",
          "details": "moderate"
        }
      ],
      "title": "CVE-2026-41181"
    }
  ]
}

CVE-2026-41181 (GCVE-0-2026-41181)

Vulnerability from cvelistv5 – Published: 2026-05-15 16:27 – Updated: 2026-05-16 01:11

Title

Traefik: Errors middleware forwards Authorization and Cookie headers to separate error page service

Summary

Traefik is an HTTP reverse proxy and load balancer. Prior to 2.11.44, 3.6.15, and 3.7.0-rc.3, there is an information disclosure vulnerability in Traefik's errors (custom error pages) middleware. When the backend returns a response matching the configured status range, the middleware forwards the original request's complete header set, including Authorization, Cookie, and other authentication material, to the separate error page service rather than only the minimal context needed to render the error page. This behavior is undocumented: the documentation states only that Host is forwarded by default, so operators are not warned that sensitive credentials are shared across service boundaries. Deployments using the errors middleware with a distinct error page service may inadvertently expose end-user credentials to infrastructure that was not intended to receive them. This vulnerability is fixed in 2.11.44, 3.6.15, and 3.7.0-rc.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:N/SA:N

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-16 01:10 UTC

CWE

CWE-201 - Insertion of Sensitive Information Into Sent Data

Assigner

GitHub_M mitre root

References

4 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/v3.6.15	x_refsource_MISC
https://github.com/traefik/traefik/releases/tag/v…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
traefik	traefik	Affected: >= 3.7.0-rc.0, < 3.7.0-rc.3 Affected: >= 3.0.0-beta1, < 3.6.14 Affected: < 2.11.43

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-41181",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-16T01:10:51.338125Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-16T01:11:03.867Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "traefik",
          "vendor": "traefik",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 3.7.0-rc.0, \u003c 3.7.0-rc.3"
            },
            {
              "status": "affected",
              "version": "\u003e= 3.0.0-beta1, \u003c 3.6.14"
            },
            {
              "status": "affected",
              "version": "\u003c 2.11.43"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Traefik is an HTTP reverse proxy and load balancer. Prior to 2.11.44, 3.6.15, and 3.7.0-rc.3, there is an information disclosure vulnerability in Traefik\u0027s errors (custom error pages) middleware. When the backend returns a response matching the configured status range, the middleware forwards the original request\u0027s complete header set, including Authorization, Cookie, and other authentication material, to the separate error page service rather than only the minimal context needed to render the error page. This behavior is undocumented: the documentation states only that Host is forwarded by default, so operators are not warned that sensitive credentials are shared across service boundaries. Deployments using the errors middleware with a distinct error page service may inadvertently expose end-user credentials to infrastructure that was not intended to receive them. This vulnerability is fixed in 2.11.44, 3.6.15, and 3.7.0-rc.3."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 6.9,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "LOW",
            "subIntegrityImpact": "NONE",
            "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:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-201",
              "description": "CWE-201: Insertion of Sensitive Information Into Sent Data",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-15T16:27:14.823Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/traefik/traefik/security/advisories/GHSA-p6hg-qh38-555r",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/traefik/traefik/security/advisories/GHSA-p6hg-qh38-555r"
        },
        {
          "name": "https://github.com/traefik/traefik/releases/tag/v2.11.44",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/traefik/traefik/releases/tag/v2.11.44"
        },
        {
          "name": "https://github.com/traefik/traefik/releases/tag/v3.6.15",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/traefik/traefik/releases/tag/v3.6.15"
        },
        {
          "name": "https://github.com/traefik/traefik/releases/tag/v3.7.0-rc.3",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/traefik/traefik/releases/tag/v3.7.0-rc.3"
        }
      ],
      "source": {
        "advisory": "GHSA-p6hg-qh38-555r",
        "discovery": "UNKNOWN"
      },
      "title": "Traefik: Errors middleware forwards Authorization and Cookie headers to separate error page service"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-41181",
    "datePublished": "2026-05-15T16:27:14.823Z",
    "dateReserved": "2026-04-17T16:34:45.526Z",
    "dateUpdated": "2026-05-16T01:11:03.867Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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OPENSUSE-SU-2026:10714-1

CVE-2026-41181 (GCVE-0-2026-41181)

Tags

Sightings

Nomenclature

Related by attack behaviour