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CVE-2026-52831
Nuclio: Unsanitized cron trigger event headers/body injected into CronJob shell command leads to persistent RCE
High8.0EPSS 0.53%
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | High8.0 | CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H |
| NVDNVD · Deferred | 3.1 | High8.0 | CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.53% · top 55% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
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The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.0.
Weakness
Affected products
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Gogithub.com/nuclio/nuclioGHSA-v5px-423j-pf7p (opens in a new tab)
References (3)
- https://github.com/nuclio/nuclio/security/advisories/GHSA-v5px-423j-pf7p (opens in a new tab)x_refsource_CONFIRM
- https://github.com/nuclio/nuclio/commit/3356b86a8bfab3f960aa420310ebff765df9dede (opens in a new tab)x_refsource_MISC
- https://github.com/nuclio/nuclio/releases/tag/1.16.4 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-v5px-423j-pf7p (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-52831)Record last updated .