CVE-2026-18991

nanocoai NanoClaw send_file core.ts path traversal

Published Aug 6, 2026 CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed

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

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

nanocoai

NanoClaw

affected

Version	Status	Constraints
`2.0.0`	affected	—
`2.0.1`	affected	—
`2.0.2`	affected	—
`2.0.3`	affected	—
`2.0.4`	affected	—
`2.0.5`	affected	—
`2.0.6`	affected	—
`2.0.7`	affected	—
`2.0.8`	affected	—
`2.0.9`	affected	—
`2.0.10`	affected	—
`2.0.11`	affected	—
`2.0.12`	affected	—
`2.0.13`	affected	—
`2.0.14`	affected	—
`2.0.15`	affected	—
`2.0.16`	affected	—
`2.0.17`	affected	—
`2.0.18`	affected	—
`2.0.19`	affected	—
`2.0.20`	affected	—
`2.0.21`	affected	—
`2.0.22`	affected	—
`2.0.23`	affected	—
`2.0.24`	affected	—
`2.0.25`	affected	—
`2.0.26`	affected	—
`2.0.27`	affected	—
`2.0.28`	affected	—
`2.0.29`	affected	—
`2.0.30`	affected	—
`2.0.31`	affected	—
`2.0.32`	affected	—
`2.0.33`	affected	—
`2.0.34`	affected	—
`2.0.35`	affected	—
`2.0.36`	affected	—
`2.0.37`	affected	—
`2.0.38`	affected	—
`2.0.39`	affected	—
`2.0.40`	affected	—
`2.0.41`	affected	—
`2.0.42`	affected	—
`2.0.43`	affected	—
`2.0.44`	affected	—
`2.0.45`	affected	—
`2.0.46`	affected	—
`2.0.47`	affected	—
`2.0.48`	affected	—
`2.0.49`	affected	—
`2.0.50`	affected	—
`2.0.51`	affected	—
`2.0.52`	affected	—
`2.0.53`	affected	—
`2.0.54`	affected	—
`2.0.55`	affected	—
`2.0.56`	affected	—
`2.0.57`	affected	—
`2.0.58`	affected	—
`2.0.59`	affected	—
`2.0.60`	affected	—
`2.0.61`	affected	—
`2.0.62`	affected	—
`2.0.63`	affected	—
`2.0.64`	affected	—

No data.

Vendor Product Versions

Nanocoai

Nanoclaw

Version	Status	Scheme	Platform
`[2.0.0,2.0.64]`	affected	semver	—

Remediation

No solution or workaround provided in the CVE record

Tracking

Advisories

No advisories available

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction None

Access Vector Network

Access Complexity Low

Authentication None

Confidentiality Impact Partial

Integrity Impact Partial

Availability Impact Partial

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.615% probability within 30 days)

Exploitation poc

Automatable yes

Technical Impact partial

References

Link	Providers
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

History

Aug 6, 2026 3:30 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Aug 6, 2026 3:15 AM Description updated. Title updated. First appearance in the feed. Weaknesses updated. Affected versions updated. Affected vendors updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
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.
Title		nanocoai NanoClaw send_file core.ts path traversal
First Time appeared		Nanocoai Nanocoai nanoclaw
Weaknesses		CWE-22
CPEs		cpe:2.3:a:nanocoai:nanoclaw::::::::
Vendors & Products		Nanocoai Nanocoai nanoclaw
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
Metrics		cvssV2_0 `{'score': 7.5, 'vector': 'AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:ND/RC:UR'}` cvssV3_0 `{'score': 7.3, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R'}` cvssV3_1 `{'score': 7.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R'}` cvssV4_0 `{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P'}`