CVE-2026-45393 (GCVE-0-2026-45393)

Vulnerability from cvelistv5 – Published: 2026-05-12 01:06 – Updated: 2026-06-02 15:55
VLAI
Title
Local privilege escalation to SYSTEM in Cribl Edge for Windows
Summary
A vulnerability chain in Cribl Edge for Windows before 4.17.1 allows a local authenticated user to escalate privileges to NT AUTHORITY\SYSTEM. Incorrect default permissions on the Windows installer's authentication directory (CWE-276) expose a cryptographic secret used for JWT signing and password-hash derivation, enabling forgery of administrative API tokens. The forged token can then be used to invoke a pipeline function that reaches an OS command sink (CWE-78) running in the SYSTEM context.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-15 10:57 UTC
CWE
  • CWE-276 - Incorrect Default Permissions
  • CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
  • CWE-20 - Improper Input Validation
Assigner
Cribl CNA under the icscert root
CNA scorecard – unranked: 5 records in the last 180 days, 10 needed details
References
Impacted products
Vendor Product Version CPE status
Cribl Cribl Edge Affected: 0 , < 4.17.1 (semver)
guessed Create a notification for this product.
Date Public
2026-04-20 00:00
Credits
Abdulaziz M. Almetairy, Saudi Aramco
Show details on NVD website
To clipboard 

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            "dateUpdated": "2026-06-02T15:55:07.304Z",
            "orgId": "af879a92-7297-456a-bb0e-905ac6c64bdc",
            "shortName": "Cribl"
          },
          "references": [
            {
              "name": "Cribl Edge 4.17.1 Security Fixes",
              "tags": [
                "release-notes"
              ],
              "url": "https://docs.cribl.io/edge/release-notes/release-v4171#security-fixes"
            },
            {
              "name": "Cribl Trust Portal",
              "tags": [
                "vendor-advisory"
              ],
              "url": "https://trust.cribl.io/notifications"
            }
          ],
          "solutions": [
            {
              "lang": "en",
              "supportingMedia": [
                {
                  "base64": false,
                  "type": "text/html",
                  "value": "\u003cp\u003eUpgrade Cribl Edge to v4.17.1 or higher. Upgrading fully resolves this vulnerability and no additional mitigation is required.\u003c/p\u003e"
                }
              ],
              "value": "Upgrade Cribl Edge to v4.17.1 or higher. Upgrading fully resolves this vulnerability and no additional mitigation is required."
            }
          ],
          "source": {
            "discovery": "EXTERNAL"
          },
          "title": "Local privilege escalation to SYSTEM in Cribl Edge for Windows"
        }
      },
      "cveMetadata": {
        "assignerOrgId": "af879a92-7297-456a-bb0e-905ac6c64bdc",
        "assignerShortName": "Cribl",
        "cveId": "CVE-2026-45393",
        "datePublished": "2026-05-12T01:06:27.220Z",
        "dateReserved": "2026-05-12T01:05:53.672Z",
        "dateUpdated": "2026-06-02T15:55:07.304Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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