What is CVE-2026-18991?

CVE-2026-18991 is a high-severity vulnerability in Nanocoai Nanoclaw, classified under Path Traversal. CVSS score: 7.3/10. Published 2026-08-06.

How severe is CVE-2026-18991?

High severity. CVSS v3 base score is 7.3 out of 10.

Path Traversal in Nanocoai Nanoclaw

CVE-2026-18991

A security vulnerability has been detected in nanocoai NanoClaw up to 2.0.64. This affects an unknown part of the file container/agent-runner/src/mcp-tools/core.ts of the component send_file. Such manipulation leads to path traversal. The…

Vulnerability class: Path Traversal (Directory Traversal)

CVSS v3 metric

CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.

Affected products

Nanocoai Nanoclaw — versions 2.0.0, 2.0.1, 2.0.2

Weakness classification (CWE)

CWE-22 — Path Traversal

References

cna@vuldb.com (product)
cna@vuldb.com (issue-tracking, exploit)
cna@vuldb.com (third-party-advisory)
cna@vuldb.com (third-party-advisory)
cna@vuldb.com (vdb-entry)
cna@vuldb.com (signature, permissions-required)

Frequently asked questions

What is CVE-2026-18991?: CVE-2026-18991 is a high-severity vulnerability in Nanocoai Nanoclaw, classified under Path Traversal. CVSS score: 7.3/10. Published 2026-08-06.
How severe is CVE-2026-18991?: High severity. CVSS v3 base score is 7.3 out of 10.