CVE-2026-43989

JunoClaw: upload_wasm accepted arbitrary filesystem paths without validation

CVSS 8.5 HIGHEPSS 0.1%CWE-20 CWE-22 CWE-59 CWE-73

Vexday Risk Score

21Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 8.5EPSS 0.1%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

12 May 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:L

Affected products

Dragonmonk111 · junoclaw

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References

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