CVE-2026-93539 (GCVE-0-2026-93539)
Vulnerability from cvelistv5
Published
2026-09-28 14:19
Modified
2026-09-28 16:22
CWE
  • CWE-306 - Missing authentication for critical function
Summary
A vulnerability was discovered in Fleet's Git webhook receiver (the gitjob webhook service). When a webhook secret is not configured, incoming webhook requests are accepted without verification, and processing a request can change the spec.pollingInterval field of a matching GitRepo resource in any namespace. A caller with network access to the webhook service and no Kubernetes credentials can therefore alter GitRepo configuration outside the namespaces they are authorized for.  This only affects SUSE Rancher Fleet 0.16 before 0.16.2, older versions are not affected.
Impacted products
Vendor Product Version
SUSE Rancher Version: 0.16.0   ≤
Create a notification for this product.
Show details on NVD website


{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-93539",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-28T14:59:38.674475Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-28T16:22:26.433Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "packageName": "Fleet",
          "product": "Rancher",
          "repo": "https://github.com/rancher/fleet/",
          "vendor": "SUSE",
          "versions": [
            {
              "lessThan": "0.16.2",
              "status": "affected",
              "version": "0.16.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:suse:rancher:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "0.16.2",
                  "versionStartIncluding": "0.16.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ],
          "operator": "OR"
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "https://github.com/Pig-Tail"
        }
      ],
      "datePublic": "2026-09-28T14:16:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "A vulnerability was discovered in Fleet\u0027s Git webhook receiver (the \u003ccode\u003egitjob\u003c/code\u003e webhook service). When a webhook secret is not configured, incoming webhook requests are accepted without verification, and processing a request can change the \u003ccode\u003espec.pollingInterval\u003c/code\u003e field of a matching \u003ccode\u003eGitRepo\u003c/code\u003e resource in any namespace. A caller with network access to the webhook service and no Kubernetes credentials can therefore alter \u003ccode\u003eGitRepo\u003c/code\u003e configuration outside\u003cbr\u003e\nthe namespaces they are authorized for.\u0026nbsp; This only affects SUSE Rancher Fleet 0.16 before 0.16.2, older versions are not affected."
            }
          ],
          "value": "A vulnerability was discovered in Fleet\u0027s Git webhook receiver (the gitjob webhook service). When a webhook secret is not configured, incoming webhook requests are accepted without verification, and processing a request can change the spec.pollingInterval field of a matching GitRepo resource in any namespace. A caller with network access to the webhook service and no Kubernetes credentials can therefore alter GitRepo configuration outside\n\nthe namespaces they are authorized for.\u00a0 This only affects SUSE Rancher Fleet 0.16 before 0.16.2, older versions are not affected."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-176",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-176 Configuration/Environment Manipulation"
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 5.4,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-306",
              "description": "CWE-306 Missing authentication for critical function",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-28T14:19:55.071Z",
        "orgId": "404e59f5-483d-4b8a-8e7a-e67604dd8afb",
        "shortName": "suse"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://github.com/rancher/fleet/security/advisories/GHSA-8vfv-33cg-g75q"
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "Unauthenticated GitRepo Spec Mutation via Fleet Git Webhook Receiver",
      "x_generator": {
        "engine": "Vulnogram 1.0.5"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "404e59f5-483d-4b8a-8e7a-e67604dd8afb",
    "assignerShortName": "suse",
    "cveId": "CVE-2026-93539",
    "datePublished": "2026-09-28T14:19:55.071Z",
    "dateReserved": "2026-09-18T09:08:10.294Z",
    "dateUpdated": "2026-09-28T16:22:26.433Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-93539\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-09-28T14:59:38.674475Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-09-28T16:22:21.075Z\"}}], \"cna\": {\"title\": \"Unauthenticated GitRepo Spec Mutation via Fleet Git Webhook Receiver\", \"source\": {\"discovery\": \"EXTERNAL\"}, \"credits\": [{\"lang\": \"en\", \"type\": \"finder\", \"value\": \"https://github.com/Pig-Tail\"}], \"impacts\": [{\"capecId\": \"CAPEC-176\", \"descriptions\": [{\"lang\": \"en\", \"value\": \"CAPEC-176 Configuration/Environment Manipulation\"}]}], \"metrics\": [{\"format\": \"CVSS\", \"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 5.4, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L\", \"integrityImpact\": \"LOW\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"LOW\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"NONE\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"repo\": \"https://github.com/rancher/fleet/\", \"vendor\": \"SUSE\", \"product\": \"Rancher\", \"versions\": [{\"status\": \"affected\", \"version\": \"0.16.0\", \"lessThan\": \"0.16.2\", \"versionType\": \"semver\"}], \"packageName\": \"Fleet\", \"defaultStatus\": \"unaffected\"}], \"datePublic\": \"2026-09-28T14:16:00.000Z\", \"references\": [{\"url\": \"https://github.com/rancher/fleet/security/advisories/GHSA-8vfv-33cg-g75q\", \"tags\": [\"vendor-advisory\"]}], \"x_generator\": {\"engine\": \"Vulnogram 1.0.5\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"A vulnerability was discovered in Fleet\u0027s Git webhook receiver (the gitjob webhook service). When a webhook secret is not configured, incoming webhook requests are accepted without verification, and processing a request can change the spec.pollingInterval field of a matching GitRepo resource in any namespace. A caller with network access to the webhook service and no Kubernetes credentials can therefore alter GitRepo configuration outside\\n\\nthe namespaces they are authorized for.\\u00a0 This only affects SUSE Rancher Fleet 0.16 before 0.16.2, older versions are not affected.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"A vulnerability was discovered in Fleet\u0027s Git webhook receiver (the \u003ccode\u003egitjob\u003c/code\u003e webhook service). When a webhook secret is not configured, incoming webhook requests are accepted without verification, and processing a request can change the \u003ccode\u003espec.pollingInterval\u003c/code\u003e field of a matching \u003ccode\u003eGitRepo\u003c/code\u003e resource in any namespace. A caller with network access to the webhook service and no Kubernetes credentials can therefore alter \u003ccode\u003eGitRepo\u003c/code\u003e configuration outside\u003cbr\u003e\\nthe namespaces they are authorized for.\u0026nbsp; This only affects SUSE Rancher Fleet 0.16 before 0.16.2, older versions are not affected.\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-306\", \"description\": \"CWE-306 Missing authentication for critical function\"}]}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:a:suse:rancher:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"0.16.2\", \"versionStartIncluding\": \"0.16.0\"}], \"operator\": \"OR\"}], \"operator\": \"OR\"}], \"providerMetadata\": {\"orgId\": \"404e59f5-483d-4b8a-8e7a-e67604dd8afb\", \"shortName\": \"suse\", \"dateUpdated\": \"2026-09-28T14:19:55.071Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-93539\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-09-28T16:22:26.433Z\", \"dateReserved\": \"2026-09-18T09:08:10.294Z\", \"assignerOrgId\": \"404e59f5-483d-4b8a-8e7a-e67604dd8afb\", \"datePublished\": \"2026-09-28T14:19:55.071Z\", \"assignerShortName\": \"suse\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.


Loading…

Loading…

Loading…

Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.


Loading…

Loading…