CVE-2026-52832 Nuclio: Unauthenticated path traversal in spec.handler allows arbitrary file write in Dashboard container
Unauthenticated attackers can write arbitrary files via path traversal in the Nuclio Dashboard, potentially leading to code execution.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-52832?
CVE-2026-52832 is a medium-severity path traversal vulnerability in nuclio, published on 2 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official 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.
Weakness: CWE-22
Which versions are affected by CVE-2026-52832?
3 open source packages ship an affected version, including github.com/nuclio/nuclio.
| Package | Affected | Fixed in |
|---|---|---|
github.com/nuclio/nuclio Go | All versions | None |
github.com/nuclio/nuclio Go | All versions | 1.16.5 |
github.com/nuclio/nuclio Go | All versions | 1.16.5 |
How do I fix CVE-2026-52832?
Upgrade github.com/nuclio/nuclio to 1.16.5 or later.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-52832 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-52832 exists.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-wpcj-rmv4-86qg, GO-2026-6012.