{"id":"CVE-2026-45393","state":"PUBLISHED","title":"Local privilege escalation to SYSTEM in Cribl Edge for Windows","description":"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.","publishedAt":"2026-05-12T01:06:27.220Z","updatedAt":"2026-06-02T15:55:07.304Z","severity":{"score":8.5,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","source":"Cribl"},"assigner":"Cribl","products":["Cribl Cribl Edge"],"affected":[{"vendor":"Cribl","product":"Cribl Edge","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"4.17.1","versionType":"semver"}],"platforms":["Windows"]}],"references":["https://docs.cribl.io/edge/release-notes/release-v4171#security-fixes","https://trust.cribl.io/notifications"],"weaknesses":["CWE-276","CWE-78","CWE-20"],"ingestedAt":"2026-10-29T20:12:07.131Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/45xxx/CVE-2026-45393.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-45393","state":"PUBLISHED","datePublished":"2026-05-12T01:06:27.220Z","dateUpdated":"2026-06-02T15:55:07.304Z","assignerShortName":"Cribl","assignerOrgId":"af879a92-7297-456a-bb0e-905ac6c64bdc","dateReserved":"2026-05-12T01:05:53.672Z"},"containers":{"cna":{"title":"Local privilege escalation to SYSTEM in Cribl Edge for Windows","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"Cribl","product":"Cribl Edge","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"4.17.1","versionType":"semver"}],"platforms":["Windows"]}],"references":[{"url":"https://docs.cribl.io/edge/release-notes/release-v4171#security-fixes","name":"Cribl Edge 4.17.1 Security Fixes","tags":["release-notes"]},{"url":"https://trust.cribl.io/notifications","name":"Cribl Trust Portal","tags":["vendor-advisory"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"cvssV4_0":{"version":"4.0","vectorString":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","baseScore":8.5,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","exploitMaturity":"PROOF_OF_CONCEPT","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-276","lang":"en","type":"CWE","description":"CWE-276 Incorrect Default Permissions"}]},{"descriptions":[{"cweId":"CWE-78","lang":"en","type":"CWE","description":"CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')"}]}],"providerMetadata":{"shortName":"Cribl","orgId":"af879a92-7297-456a-bb0e-905ac6c64bdc","dateUpdated":"2026-06-02T15:55:07.304Z"},"datePublic":"2026-04-20T00:00:00.000Z","impacts":[{"capecId":"CAPEC-69","descriptions":[{"lang":"en","value":"CAPEC-69 Target Programs with Elevated Privileges"}]},{"capecId":"CAPEC-233","descriptions":[{"lang":"en","value":"CAPEC-233 Privilege Escalation"}]},{"capecId":"CAPEC-88","descriptions":[{"lang":"en","value":"CAPEC-88 OS Command Injection"}]}],"source":{"discovery":"EXTERNAL"},"solutions":[{"lang":"en","value":"Upgrade Cribl Edge to v4.17.1 or higher. Upgrading fully resolves this vulnerability and no additional mitigation is required.","supportingMedia":[{"type":"text/html","base64":false,"value":"<p>Upgrade Cribl Edge to v4.17.1 or higher. Upgrading fully resolves this vulnerability and no additional mitigation is required.</p>"}]}],"credits":[{"lang":"en","type":"finder","value":"Abdulaziz M. Almetairy, Saudi Aramco"}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":9.8,"attackVector":"NETWORK","baseSeverity":"CRITICAL","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","integrityImpact":"HIGH","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"NONE","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-05-15T10:57:55.624673Z","id":"CVE-2026-45393","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-20","type":"CWE","lang":"en","description":"CWE-20 Improper Input Validation"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-05-15T20:04:21.419Z"}}]}}}