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GHSA-6xx4-9wp6-65p7

MediumCVSS 6.5 / 10

Published Jul 28, 2026·Last modified Jul 28, 2026

Affected Components(0)

No affected components available

Description

Impact

skilo add installs a skill by recursively copying the skill directory into the target skills directory. The copy routine (copy_dir_all) classified each entry with std::fs::DirEntry::file_type() — which does not follow symlinks — and then copied non-directory entries with std::fs::copy(), which does dereference symlinks.

As a result, a skill containing a symbolic link such as reference.txt -> /home/<user>/.ssh/id_rsa was copied as a regular file whose contents are the link's target. A malicious skill source — for example a git repository installed via skilo add github.com/<attacker>/<skills>, or a local path — could read arbitrary files readable by the user running skilo add (SSH keys, cloud credentials, .env files, etc.) and place their contents inside the installed skill directory, where the user or their agent may later read, share, or sync them.

This is arbitrary local file disclosure (CWE-59 / CWE-61, symlink following) triggered by installing an untrusted skills source.

Patches

Fixed in 0.11.1. copy_dir_all now rejects symbolic-link entries at any recursion depth (failing closed with a dedicated error) instead of dereferencing them.

Workarounds

Only install skills from sources you trust.
Inspect a skill source for symbolic links before running skilo add.

Affected versions

Introduced together with the skilo add command in 0.5.0 and present through 0.11.0. Releases before 0.5.0 do not include the add command.

Risk Scores

Base Score

6.5

The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. The attacker needs the user to perform some action, like clicking a link. The impact is confined to the system where the vulnerability exists. There is a high impact on the confidentiality of the information.

Threat Intelligence

6.0

Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.

EPSS

N/A

Probability that this vulnerability will be exploited in the wild within the next 30 days.

Exploit

Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

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Medium severity

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