FKIE_CVE-2026-34179

Vulnerability from fkie_nvd - Published: 2026-04-09 10:16 - Updated: 2026-06-17 10:38
Severity
9.1 (Critical) - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Summary
In Canonical LXD versions 4.12 through 6.7, the doCertificateUpdate function in lxd/certificates.go does not validate the Type field when handling PUT/PATCH requests to /1.0/certificates/{fingerprint} for restricted TLS certificate users, allowing a remote authenticated attacker to escalate privileges to cluster admin.
References
security@ubuntu.comhttps://github.com/canonical/lxd/pull/17936Issue Tracking, Patch
security@ubuntu.comhttps://github.com/canonical/lxd/security/advisories/GHSA-c3h3-89qf-jqm5Exploit, Third Party Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/canonical/lxd/security/advisories/GHSA-c3h3-89qf-jqm5Exploit, Third Party Advisory
Impacted products
Vendor Product Version
canonical lxd *
canonical lxd *
canonical lxd *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://github.com/canonical",
          "defaultStatus": "unaffected",
          "packageName": "lxd",
          "platforms": [
            "Linux"
          ],
          "product": "lxd",
          "programFiles": [
            "permissions.go"
          ],
          "repo": "https://github.com/canonical/lxd",
          "vendor": "Canonical",
          "versions": [
            {
              "lessThan": "5.0.7",
              "status": "affected",
              "version": "4.12.0",
              "versionType": "semver"
            },
            {
              "lessThan": "5.21.5",
              "status": "affected",
              "version": "5.1.0",
              "versionType": "semver"
            },
            {
              "lessThan": "6.8.0",
              "status": "affected",
              "version": "6.0.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "security@ubuntu.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:canonical:lxd:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "41A5CC7C-00BE-436D-957A-4636E52D0DF1",
              "versionEndIncluding": "5.0.6",
              "versionStartIncluding": "4.12",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:canonical:lxd:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "92A82DF4-3ED9-47E0-BDF1-DB9138EE0883",
              "versionEndIncluding": "5.21.4",
              "versionStartIncluding": "5.21.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:canonical:lxd:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "5C28FC63-0BE4-4B40-A87F-DF242AE33303",
              "versionEndIncluding": "6.7",
              "versionStartIncluding": "6.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In Canonical LXD versions 4.12 through 6.7, the doCertificateUpdate function in lxd/certificates.go does not validate the Type field when handling PUT/PATCH requests to /1.0/certificates/{fingerprint} for restricted TLS certificate users, allowing a remote authenticated attacker to escalate privileges to cluster admin."
    }
  ],
  "id": "CVE-2026-34179",
  "lastModified": "2026-06-17T10:38:36.550",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.1,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "HIGH",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.3,
        "impactScore": 6.0,
        "source": "security@ubuntu.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-34179",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-04-09T11:54:14.860013Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-04-09T10:16:21.963",
  "references": [
    {
      "source": "security@ubuntu.com",
      "tags": [
        "Issue Tracking",
        "Patch"
      ],
      "url": "https://github.com/canonical/lxd/pull/17936"
    },
    {
      "source": "security@ubuntu.com",
      "tags": [
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      "url": "https://github.com/canonical/lxd/security/advisories/GHSA-c3h3-89qf-jqm5"
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    {
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  "sourceIdentifier": "security@ubuntu.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "description": [
        {
          "lang": "en",
          "value": "CWE-915"
        }
      ],
      "source": "security@ubuntu.com",
      "type": "Secondary"
    }
  ]
}


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