Vulnerability-Lookup

CVE-2026-44945 (GCVE-0-2026-44945)

Vulnerability from cvelistv5 – Published: 2026-08-05 10:00 – Updated: 2026-08-06 03:55

Title

Cross-Cluster Impersonation Confused-Deputy Privilege Escalation

Summary

A privilege escalation vulnerability exists in Rancher's impersonation middleware (pkg/auth/requests/impersonate.go). An authenticated Rancher user with the default user global role can gain full administrative access to the Rancher control plane and transitively to all downstream clusters it manages. This issue affects Rancher: from 2.11.0 before 2.11.16, from 2.12.0 before 2.12.12, from 2.13.0 before 2.13.8, and from 2.14.0 before 2.14.2.

Severity

9.1 (Critical)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator (v2.0.3)

CWE

CWE-441 - Unintended Proxy or Intermediary ('Confused Deputy')
CWE-497 - Exposure of sensitive system information to an unauthorized control sphere

Assigner

suse

References

3 references

URL	Tags
https://github.com/rancher/rancher/pull/55983	patch
https://github.com/rancher/rancher/security/advis…	vendor-advisory
https://bugzilla.suse.com/show_bug.cgi?id=CVE-202…	issue-tracking

Impacted products

1 product

Vendor	Product	Version
SUSE	Rancher	Affected: 2.11.0 , < 2.11.16 (semver) Affected: 2.12.0 , < 2.12.12 (semver) Affected: 2.13.0 , < 2.13.8 (semver) Affected: 2.14.0 , < 2.14.2 (semver)

Credits

This vulnerability was discovered and reported by @BenTheCyberOne.

Show details on NVD website

JSON

To clipboard

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WID-SEC-W-2026-2600

Vulnerability from csaf_certbund - Published: 2026-07-30 22:00 - Updated: 2026-08-05 22:00

Summary

Rancher: Mehrere Schwachstellen

Severity

Hoch

Notes

Das BSI ist als Anbieter für die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch dafür verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgfältig im Einzelfall zu prüfen.

Produktbeschreibung: Rancher ist ein Werkzeug für die Verwaltung von Kubernetes-Container basierten Umgebungen.

Angriff: Ein Angreifer kann mehrere Schwachstellen in Rancher ausnutzen, um seine Privilegien zu erhöhen, um einen Denial of Service Angriff durchzuführen, und um Informationen offenzulegen.

Betroffene Betriebssysteme: - Linux - UNIX

CVE-2026-44945

Affected products

Known affected 4 products

Product	Identifier	Version	Remediation
Rancher Rancher <2.14.4 Rancher / Rancher		<2.14.4
Rancher Rancher <2.13.8 Rancher / Rancher		<2.13.8
Rancher Rancher <2.12.12 Rancher / Rancher		<2.12.12
Rancher Rancher <2.11.16 Rancher / Rancher		<2.11.16

CVE-2026-55996

Affected products

Known affected 4 products

Product	Identifier	Version	Remediation
Rancher Rancher <2.14.4 Rancher / Rancher		<2.14.4
Rancher Rancher <2.13.8 Rancher / Rancher		<2.13.8
Rancher Rancher <2.12.12 Rancher / Rancher		<2.12.12
Rancher Rancher <2.11.16 Rancher / Rancher		<2.11.16

CVE-2026-55997

Affected products

Known affected 4 products

Product	Identifier	Version	Remediation
Rancher Rancher <2.14.4 Rancher / Rancher		<2.14.4
Rancher Rancher <2.13.8 Rancher / Rancher		<2.13.8
Rancher Rancher <2.12.12 Rancher / Rancher		<2.12.12
Rancher Rancher <2.11.16 Rancher / Rancher		<2.11.16

CVE-2026-55998

Affected products

Known affected 4 products

Product	Identifier	Version	Remediation
Rancher Rancher <2.14.4 Rancher / Rancher		<2.14.4
Rancher Rancher <2.13.8 Rancher / Rancher		<2.13.8
Rancher Rancher <2.12.12 Rancher / Rancher		<2.12.12
Rancher Rancher <2.11.16 Rancher / Rancher		<2.11.16

CVE-2026-59675

Affected products

Known affected 4 products

Product	Identifier	Version	Remediation
Rancher Rancher <2.14.4 Rancher / Rancher		<2.14.4
Rancher Rancher <2.13.8 Rancher / Rancher		<2.13.8
Rancher Rancher <2.12.12 Rancher / Rancher		<2.12.12
Rancher Rancher <2.11.16 Rancher / Rancher		<2.11.16

References

7 references

URL	Category
https://wid.cert-bund.de/.well-known/csaf/white/2…	self
https://wid.cert-bund.de/portal/wid/securityadvis…	self
https://github.com/rancher/rancher/security/advis…	external
https://github.com/rancher/rancher/security/advis…	external
https://github.com/rancher/rancher/security/advis…	external
https://github.com/rancher/rancher/security/advis…	external
https://github.com/rancher/rancher/security/advis…	external

JSON

To clipboard

{
  "document": {
    "aggregate_severity": {
      "text": "hoch"
    },
    "category": "csaf_base",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "de-DE",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "Das BSI ist als Anbieter f\u00fcr die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch daf\u00fcr verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgf\u00e4ltig im Einzelfall zu pr\u00fcfen."
      },
      {
        "category": "description",
        "text": "Rancher ist ein Werkzeug f\u00fcr die Verwaltung von Kubernetes-Container basierten Umgebungen.",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein Angreifer kann mehrere Schwachstellen in Rancher ausnutzen, um seine Privilegien zu erh\u00f6hen, um einen Denial of Service Angriff durchzuf\u00fchren, und um Informationen offenzulegen.",
        "title": "Angriff"
      },
      {
        "category": "general",
        "text": "- Linux\n- UNIX",
        "title": "Betroffene Betriebssysteme"
      }
    ],
    "publisher": {
      "category": "other",
      "contact_details": "csaf-provider@cert-bund.de",
      "name": "Bundesamt f\u00fcr Sicherheit in der Informationstechnik",
      "namespace": "https://www.bsi.bund.de"
    },
    "references": [
      {
        "category": "self",
        "summary": "WID-SEC-W-2026-2600 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-2600.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2026-2600 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2600"
      },
      {
        "category": "external",
        "summary": "GitHub Security Advisory GHSA-23h9-rr79-r3gh vom 2026-07-30",
        "url": "https://github.com/rancher/rancher/security/advisories/GHSA-23h9-rr79-r3gh"
      },
      {
        "category": "external",
        "summary": "GitHub Security Advisory GHSA-7r53-jvhg-9jq4 vom 2026-07-30",
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      },
      {
        "category": "external",
        "summary": "GitHub Security Advisory GHSA-9jxv-832x-45q9 vom 2026-07-30",
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      {
        "category": "external",
        "summary": "GitHub Security Advisory GHSA-g4f6-44g4-23xm vom 2026-07-30",
        "url": "https://github.com/rancher/rancher/security/advisories/GHSA-g4f6-44g4-23xm"
      },
      {
        "category": "external",
        "summary": "GitHub Security Advisory GHSA-v584-7w32-jwpq vom 2026-07-30",
        "url": "https://github.com/rancher/rancher/security/advisories/GHSA-v584-7w32-jwpq"
      }
    ],
    "source_lang": "en-US",
    "title": "Rancher: Mehrere Schwachstellen",
    "tracking": {
      "current_release_date": "2026-08-05T22:00:00.000+00:00",
      "generator": {
        "date": "2026-08-06T08:52:30.378+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.6.0"
        }
      },
      "id": "WID-SEC-W-2026-2600",
      "initial_release_date": "2026-07-30T22:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2026-07-30T22:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        },
        {
          "date": "2026-08-04T22:00:00.000+00:00",
          "number": "2",
          "summary": "Referenz(en) aufgenommen: EUVD-2026-53291, EUVD-2026-53290"
        },
        {
          "date": "2026-08-05T22:00:00.000+00:00",
          "number": "3",
          "summary": "Referenz(en) aufgenommen: EUVD-2026-53298"
        }
      ],
      "status": "final",
      "version": "3"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c2.14.4",
                "product": {
                  "name": "Rancher Rancher \u003c2.14.4",
                  "product_id": "T057446"
                }
              },
              {
                "category": "product_version",
                "name": "2.14.4",
                "product": {
                  "name": "Rancher Rancher 2.14.4",
                  "product_id": "T057446-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:rancher:rancher:2.14.4"
                  }
                }
              },
              {
                "category": "product_version_range",
                "name": "\u003c2.13.8",
                "product": {
                  "name": "Rancher Rancher \u003c2.13.8",
                  "product_id": "T057447"
                }
              },
              {
                "category": "product_version",
                "name": "2.13.8",
                "product": {
                  "name": "Rancher Rancher 2.13.8",
                  "product_id": "T057447-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:rancher:rancher:2.13.8"
                  }
                }
              },
              {
                "category": "product_version_range",
                "name": "\u003c2.12.12",
                "product": {
                  "name": "Rancher Rancher \u003c2.12.12",
                  "product_id": "T057448"
                }
              },
              {
                "category": "product_version",
                "name": "2.12.12",
                "product": {
                  "name": "Rancher Rancher 2.12.12",
                  "product_id": "T057448-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:rancher:rancher:2.12.12"
                  }
                }
              },
              {
                "category": "product_version_range",
                "name": "\u003c2.11.16",
                "product": {
                  "name": "Rancher Rancher \u003c2.11.16",
                  "product_id": "T057449"
                }
              },
              {
                "category": "product_version",
                "name": "2.11.16",
                "product": {
                  "name": "Rancher Rancher 2.11.16",
                  "product_id": "T057449-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:rancher:rancher:2.11.16"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "Rancher"
          }
        ],
        "category": "vendor",
        "name": "Rancher"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-44945",
      "product_status": {
        "known_affected": [
          "T057446",
          "T057447",
          "T057448",
          "T057449"
        ]
      },
      "release_date": "2026-07-30T22:00:00.000+00:00",
      "title": "CVE-2026-44945"
    },
    {
      "cve": "CVE-2026-55996",
      "product_status": {
        "known_affected": [
          "T057446",
          "T057447",
          "T057448",
          "T057449"
        ]
      },
      "release_date": "2026-07-30T22:00:00.000+00:00",
      "title": "CVE-2026-55996"
    },
    {
      "cve": "CVE-2026-55997",
      "product_status": {
        "known_affected": [
          "T057446",
          "T057447",
          "T057448",
          "T057449"
        ]
      },
      "release_date": "2026-07-30T22:00:00.000+00:00",
      "title": "CVE-2026-55997"
    },
    {
      "cve": "CVE-2026-55998",
      "product_status": {
        "known_affected": [
          "T057446",
          "T057447",
          "T057448",
          "T057449"
        ]
      },
      "release_date": "2026-07-30T22:00:00.000+00:00",
      "title": "CVE-2026-55998"
    },
    {
      "cve": "CVE-2026-59675",
      "product_status": {
        "known_affected": [
          "T057446",
          "T057447",
          "T057448",
          "T057449"
        ]
      },
      "release_date": "2026-07-30T22:00:00.000+00:00",
      "title": "CVE-2026-59675"
    }
  ]
}

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.

Detection rules are retrieved from Rulezet.

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.

Action not permitted

CVE-2026-44945 (GCVE-0-2026-44945)

WID-SEC-W-2026-2600

Tags

Sightings

Nomenclature