CVE-2026-43989

JunoClaw: upload_wasm accepted arbitrary filesystem paths without validation

8.5 High

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.

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: Low
Privileges needed: None
User interaction: Required

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: Low

Exploit likelihood

0.15%Up 0.1 points since May 13, 2026

What each source reports

CVE List Score used 8.5

JunoClaw: upload_wasm accepted arbitrary filesystem paths without validation

Record: CVE-2026-43989
CVSS 3.1: 8.5 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:L
Weakness: CWE-20, CWE-22, CWE-59, CWE-73
Updated: 2026-11-02

EUVDEUVD-2026-29538 8.5

Record: EUVD-2026-29538
CVSS 3.1: 8.5 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:L
Updated: 2026-11-02

NVD 8.5

Record: CVE-2026-43989
CVSS 3.1: 8.5 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:L
Weakness: CWE-20, CWE-22, CWE-59, CWE-73
Updated: 2026-11-02

OSV 8.5

JunoClaw: upload_wasm accepted arbitrary filesystem paths without validation

Record: CVE-2026-43989
CVSS 3.1: 8.5 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:L
Weakness: CWE-20, CWE-22, CWE-59, CWE-73
Updated: 2026-11-02

Affected products

dragonmonk111 junoclaw

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-43989 is a high vulnerability (CVSS 8.5) in Dragonmonk111 Junoclaw, published May 12, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.15%, the 3rd percentile. No source names a fixed version.