Authenticated file read and overwrite via hardlinks
Published Jul 14, 2026 · Updated Jul 14, 2026
Link following in Picobot 0.1 and 0.2.0 allows remote authenticated users to read or overwrite files outside the workspace. The default agent loop combines an unconstrained exec tool with filesystem and skill methods that follow in-workspace hardlinks to external inodes. An admitted chat or CLI user must create the hardlink first, and access remains bounded by the Picobot process account's file permissions.
Summary
What happened
Link following in Picobot 0.1 and 0.2.0 allows remote authenticated users to read or overwrite files outside the workspace. The default agent loop combines an unconstrained exec tool with filesystem and skill methods that follow in-workspace hardlinks to external inodes. An admitted chat or CLI user must create the hardlink first, and access remains bounded by the Picobot process account's file permissions.
The record
- CVE
- CVE-2026-15629
- Published
- Jul 14, 2026
- Updated
- Jul 14, 2026
- Vendor
- louisho5
- Product
- Picobot
- Classifications
- CWE-59, T1005, T1565.001
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 14, 2026CVE publishedPublication date reported by the CVE source.
- Jul 14, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0.1
- Affected versionversion=0.2.0
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Picobot workspace hardlink bypass verification scriptproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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