What’s Vulnerable › Vulnerabilities

CVE-2026-52832: Nuclio: Unauthenticated path traversal in spec.handler allows arbitrary file write in Dashboard container

• Severity: medium (CVSS 4.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-02 · updated 2026-09-09
• Weakness: CWE-22

Description

Nuclio is a "Serverless" framework for Real-Time Events and Data Processing. Prior to version 1.16.5, Nuclio Dashboard exposes POST /api/functions without authentication by default (NOP auth mode). The spec.handler field (e.g., mymodule:myfunction) is parsed by functionconfig.ParseHandler() which splits on : only — no path validation is applied to the module portion. This issue has been patched in version 1.16.5.

Affected products

• nuclio: before 1.16.5

References

• https://github.com/nuclio/nuclio/commit/2a55d3a8bd4d49226cb4742020303f5bf2a0931d
• https://github.com/nuclio/nuclio/pull/4143
• https://github.com/nuclio/nuclio/releases/tag/1.16.5
• https://github.com/nuclio/nuclio/security/advisories/GHSA-wpcj-rmv4-86qg
• https://github.com/nuclio/nuclio/security/advisories/GHSA-wpcj-rmv4-86qg

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