FKIE_CVE-2026-45807

Vulnerability from fkie_nvd - Published: 2026-06-26 22:16 - Updated: 2026-07-01 12:42
Severity
7.7 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Summary
Kestra is an open-source, event-driven orchestration platform. Prior to 1.0.43 and 1.3.19, several Kestra API endpoints accept a kestra:// URI from the client and pass it through StorageInterface.parentTraversalGuard before reading the underlying file from the local storage backend. The guard only inspects the literal URI.toString(), so a URL-encoded .. written as %2E%2E slips through. The downstream code then calls URI.getPath(), which decodes %2E%2E back to .., and the resulting path is handed to Paths.get(...) without normalization. The OS resolves the .. segments at open(2) time, so an authenticated user with a single execution can read any file the Kestra process has access to on the host filesystem (/etc/passwd, mounted secrets, other tenants' execution outputs, etc.). This vulnerability is fixed in 1.0.43 and 1.3.19.
References
security-advisories@github.comhttps://github.com/kestra-io/kestra/security/advisories/GHSA-3529-p4wf-xp79Exploit, Mitigation, Vendor Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/kestra-io/kestra/security/advisories/GHSA-3529-p4wf-xp79Exploit, Mitigation, Vendor Advisory
Impacted products
Vendor Product Version
kestra kestra *
kestra kestra *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "kestra",
          "vendor": "kestra-io",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.0.43"
            },
            {
              "status": "affected",
              "version": "\u003e= 1.1.0, \u003c 1.3.19"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
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              "criteria": "cpe:2.3:a:kestra:kestra:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "C005B053-CC37-4203-91FE-98E3E249BAEB",
              "versionEndExcluding": "1.0.43",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:kestra:kestra:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "DED0B568-FA78-4A20-895C-100E445F8771",
              "versionEndExcluding": "1.3.19",
              "versionStartIncluding": "1.1.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Kestra is an open-source, event-driven orchestration platform. Prior to 1.0.43 and 1.3.19, several Kestra API endpoints accept a kestra:// URI from the client and pass it through StorageInterface.parentTraversalGuard before reading the underlying file from the local storage backend. The guard only inspects the literal URI.toString(), so a URL-encoded .. written as %2E%2E slips through. The downstream code then calls URI.getPath(), which decodes %2E%2E back to .., and the resulting path is handed to Paths.get(...) without normalization. The OS resolves the .. segments at open(2) time, so an authenticated user with a single execution can read any file the Kestra process has access to on the host filesystem (/etc/passwd, mounted secrets, other tenants\u0027 execution outputs, etc.). This vulnerability is fixed in 1.0.43 and 1.3.19."
    }
  ],
  "id": "CVE-2026-45807",
  "lastModified": "2026-07-01T12:42:40.193",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.7,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.1,
        "impactScore": 4.0,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
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    "ssvcV203": [
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
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          "options": [
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              "exploitation": "poc"
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            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-06-29T12:13:25.005390Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-06-26T22:16:31.973",
  "references": [
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      "source": "security-advisories@github.com",
      "tags": [
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        "Mitigation",
        "Vendor Advisory"
      ],
      "url": "https://github.com/kestra-io/kestra/security/advisories/GHSA-3529-p4wf-xp79"
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  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
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          "lang": "en",
          "value": "CWE-22"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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