{"id":"CVE-2026-52831","state":"PUBLISHED","title":"Nuclio: Unsanitized cron trigger event headers/body injected into CronJob shell command leads to persistent RCE","description":"Nuclio is a \"Serverless\" framework for Real-Time Events and Data Processing. Prior to version 1.16.4, the Nuclio controller builds a curl invocation string for each cron trigger and stores it as the args of a Kubernetes CronJob container (/bin/sh, -c, <command>). Two fields in the trigger specification flow into this string without adequate sanitization: event.headers keys and event.body. This issue has been patched in version 1.16.4.","publishedAt":"2026-09-02T16:40:28.765Z","updatedAt":"2026-09-03T14:31:56.446Z","severity":{"score":8,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["nuclio nuclio"],"affected":[{"vendor":"nuclio","product":"nuclio","versions":[{"version":"< 1.16.4","status":"affected"}]}],"references":["https://github.com/nuclio/nuclio/security/advisories/GHSA-v5px-423j-pf7p","https://github.com/nuclio/nuclio/commit/3356b86a8bfab3f960aa420310ebff765df9dede","https://github.com/nuclio/nuclio/releases/tag/1.16.4"],"weaknesses":["CWE-78"],"ingestedAt":"2026-10-29T20:12:16.098Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/52xxx/CVE-2026-52831.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-52831","state":"PUBLISHED","datePublished":"2026-09-02T16:40:28.765Z","dateUpdated":"2026-09-03T14:31:56.446Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-08T18:11:06.662Z"},"containers":{"cna":{"title":"Nuclio: Unsanitized cron trigger event headers/body injected into CronJob shell command leads to persistent RCE","descriptions":[{"lang":"en","value":"Nuclio is a \"Serverless\" framework for Real-Time Events and Data Processing. Prior to version 1.16.4, the Nuclio controller builds a curl invocation string for each cron trigger and stores it as the args of a Kubernetes CronJob container (/bin/sh, -c, <command>). Two fields in the trigger specification flow into this string without adequate sanitization: event.headers keys and event.body. This issue has been patched in version 1.16.4."}],"affected":[{"vendor":"nuclio","product":"nuclio","versions":[{"version":"< 1.16.4","status":"affected"}]}],"references":[{"url":"https://github.com/nuclio/nuclio/security/advisories/GHSA-v5px-423j-pf7p","name":"https://github.com/nuclio/nuclio/security/advisories/GHSA-v5px-423j-pf7p","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/nuclio/nuclio/commit/3356b86a8bfab3f960aa420310ebff765df9dede","name":"https://github.com/nuclio/nuclio/commit/3356b86a8bfab3f960aa420310ebff765df9dede","tags":["x_refsource_MISC"]},{"url":"https://github.com/nuclio/nuclio/releases/tag/1.16.4","name":"https://github.com/nuclio/nuclio/releases/tag/1.16.4","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"HIGH","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-78","lang":"en","description":"CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-09-02T16:40:28.765Z"},"source":{"advisory":"GHSA-v5px-423j-pf7p","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-03T14:08:01.445028Z","id":"CVE-2026-52831","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-03T14:31:56.446Z"}}]}}}