CVE-2026-56692

medium

Description

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.

References

https://www.vulncheck.com/advisories/nanoclaw-arbitrary-file-read-via-symlink-following-in-forwardattachedfiles

https://github.com/nanocoai/nanoclaw/pull/2468

https://github.com/nanocoai/nanoclaw/commit/28032bc0eca76c91fb3d8be0013e8bcaf2f5aeae

Details

Source: Mitre, NVD

Published: 2026-06-23

Updated: 2026-06-24

Risk Information

CVSS v2

Base Score: 4.6

Vector: CVSS2#AV:L/AC:L/Au:S/C:C/I:N/A:N

Severity: Medium

CVSS v3

Base Score: 5.5

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

Severity: Medium

CVSS v4

Base Score: 6.8

Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Severity: Medium

EPSS

EPSS: 0.00131