CVE-2026-56692CWE-59

CVE-2026-56692

Medium · published June 23, 2026

CVSS v3.1
5.5
EPSS
0%
Percentile
5.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.5 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00166 · 5.5th percentile
Weakness
CWE-59 · Improper Link Resolution Before File Access ('Link Following')
Published
2026-06-23T20:17Z
References (3)
https://github.com/nanocoai/nanoclaw/commit/28032bc0eca76c91fb3d8be0013e8bcaf2f5aeae · [email protected]https://github.com/nanocoai/nanoclaw/pull/2468 · [email protected]https://www.vulncheck.com/advisories/nanoclaw-arbitrary-file-read-via-symlink-following-in-forwardattachedfiles · [email protected]
EPSS history
Timeline
  • 23 JUN 15:34Z
    NanoClaw < 2.1.17 - Arbitrary File Read via Symlink Following in forwardAttachedFiles
    cvelistv5