CVE-2026-18991: nanocoai NanoClaw send_file core.ts path traversal

Severity: high (CVSS 7.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-06 · updated 2026-10-23
Weakness: CWE-22

Description

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 attack can be executed remotely. The exploit has been disclosed publicly and may be used. The project was informed of the problem early through an issue report but has not responded yet.

Affected products

nanocoai NanoClaw: 2.0.0, 2.0.1, 2.0.2, 2.0.3, 2.0.4, 2.0.5 (+59)

References

https://github.com/nanocoai/nanoclaw/
https://github.com/nanocoai/nanoclaw/issues/2760
https://vuldb.com/cve/CVE-2026-18991
https://vuldb.com/submit/862563
https://vuldb.com/vuln/386367
https://vuldb.com/vuln/386367/cti

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