# CVE-2026-15629: louisho5 picobot link following in Workspace Handler

Source: https://junglewise.ai/threats/cve-2026-15629-louisho5-picobot-link-following-in-workspace-handler  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-14. Updated: 2026-07-14  
License: CC BY 4.0 with a link back

CVE-2026-15629 · Severity: medium · CVSS 6.3 · Published 2026-07-14

louisho5 picobot is a lightweight self-hosted bot. A security flaw in its workspace handler allows an authorized user to bypass intended file access restrictions. By creating specially crafted file links, an attacker can read or overwrite sensitive files on the host system that are outside of the bot's designated workspace, potentially leading to data theft or system corruption.

Technologies: [Louisho5 Picobot](https://junglewise.ai/threats/technologies/picobot). Vendors: [Louisho5](https://junglewise.ai/threats/vendors/louisho5).

## Quick answers

**Is CVE-2026-15629 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-15629 being exploited in the wild.

**How severe is CVE-2026-15629?** Medium severity, with a CVSS score of 6.3, published 14 July 2026.

**Which products and versions are affected?** Louisho5 Picobot up to 0.2.0.

**Is there a fix for CVE-2026-15629?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-15629 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-15629?** Check whether you run Louisho5 Picobot at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A 'Link Following' vulnerability (CWE-59) exists in the Workspace Handler of louisho5 picobot up to 0.2.0. The flaw is located in the CreateSkill and GetSkill functions within internal/agent/tools/filesystem.go and internal/agent/tools/skill.go. While the application attempts to root file operations within a workspace directory, it fails to validate if the target file is a hardlink pointing to a location outside that root. An authenticated attacker can use the 'exec' tool to create a hardlink inside the workspace pointing to an external file, then use the filesystem or skill tools to read or overwrite that external file. This attack can be performed remotely by any user with permission to interact with the bot's tool-dispatch path. As of the advisory date, no patch has been released by the maintainer.

## Affected products

- louisho5 picobot up to 0.2.0

## Timeline

- 2026-07-14: advisory: NVD publication date
- 2026-07-14: disclosed: Public disclosure of the exploit and vulnerability details

## References

- [https://github.com/louisho5/picobot/](https://github.com/louisho5/picobot/)
- [https://github.com/louisho5/picobot/issues/40](https://github.com/louisho5/picobot/issues/40)
- [https://vuldb.com/cve/CVE-2026-15629](https://vuldb.com/cve/CVE-2026-15629)
- [https://vuldb.com/submit/855854](https://vuldb.com/submit/855854)
- [https://vuldb.com/vuln/378131](https://vuldb.com/vuln/378131)
- [https://vuldb.com/vuln/378131/cti](https://vuldb.com/vuln/378131/cti)

## Related threats

- [louisho5 picobot OS command injection in ExecTool.Execute](https://junglewise.ai/threats/cve-2026-15669-louisho5-picobot-os-command-injection-in-exectool-execute)
- [louisho5 picobot SSRF in WebTool.Execute](https://junglewise.ai/threats/cve-2026-15668-louisho5-picobot-ssrf-in-webtool-execute)