High
Nuclio: Unsanitized cron trigger event headers/body injected into CronJob shell command leads to persistent RCE
Type: advisorySources: OSV
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, ). 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.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-52831
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 04:22 UTC · Revision 1
Source evidence
Nuclio: Unsanitized cron trigger event headers/body injected into CronJob shell command leads to persistent RCE
core-osv · Original sourcePublished 2 Sept 2026, 16:40 UTC
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, ). 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.
osv:CVE-2026-52831
Complete source record
{
"id": "34caea392a2eade8ad32d49dc31a9347fd2f2859bfabd4075fb9dd6f5c40ecae",
"url": "https://osv.dev/vulnerability/CVE-2026-52831",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Nuclio: Unsanitized cron trigger event headers/body injected into CronJob shell command leads to persistent RCE",
"summary": "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, ). 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.",
"evidence": "osv:CVE-2026-52831",
"products": [],
"severity": "high",
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"id": "CVE-2026-52831",
"aliases": [
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"GHSA-v5px-423j-pf7p",
"GO-2026-5946"
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"modified": "2026-10-28T02:30:25.992210733Z",
"provider": "osv",
"references": [
"https://github.com/nuclio/nuclio/releases/tag/1.16.4",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/52xxx/CVE-2026-52831.json",
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"https://nvd.nist.gov/vuln/detail/CVE-2026-52831",
"https://github.com/nuclio/nuclio/commit/3356b86a8bfab3f960aa420310ebff765df9dede"
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"source_id": "core-osv",
"document_id": 492402,
"published_at": "2026-09-02T16:40:28.765+00:00"
}