CVE-2026-56692

MEDIUM 5.5

NanoClaw < 2.1.17 - Arbitrary File Read via Symlink Following in forwardAttachedFiles

CVSS Score

5.5

EPSS Score

0.0%

EPSS Percentile

0th

NanoClaw before 2.1.17 contains a symlink following vulnerability in forwardAttachedFiles that allows container-controlled agents to exfiltrate host-readable files. The host validates attachment filenames using only isSafeAttachmentName before copying with fs.copyFileSync, which follows symlinks without containment checks, allowing malicious agents to disclose arbitrary host files.

CWE	CWE-59
Vendor	nanocoai
Product	nanoclaw
Published	Jun 23, 2026

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CVSS v3 Breakdown

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

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Affected Versions

nanocoai / nanoclaw

0 < 2.1.17

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/nanocoai/nanoclaw/pull/2468 github.com: https://github.com/nanocoai/nanoclaw/commit/28032bc0eca76c91fb3d8be0013e8bcaf2f5aeae vulncheck.com: https://www.vulncheck.com/advisories/nanoclaw-arbitrary-file-read-via-symlink-following-in-forwardattachedfiles

Credits

Chia Min Jun Lennon