What’s Vulnerable › Vulnerabilities

CVE-2026-73509: OpenList: Authenticated users can rename files outside their base path via batch rename `src_name` traversal

• Severity: high (CVSS 7.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-13 · updated 2026-09-18
• Weakness: CWE-22

Description

OpenList a file list program that supports multiple storage. Prior to 4.2.4, the authenticated /api/fs/batch_rename handler in server/handles/fsbatch.go authorizes only the source directory produced by user.JoinPath(req.SrcDir) and validates renameObject.NewName with checkRelativePath, but does not validate attacker-controlled renameObject.SrcName, supplied as src_name, before concatenating it with the authorized path and passing the result to fs.Rename. A user with rename permission can use traversal segments in src_name to make path normalization select a file outside the authorized directory and configured base path, resulting in cross-user file integrity loss, limited availability impact, and file-existence disclosure through success or error responses. This issue is fixed in version 4.2.4.

Affected products

• OpenListTeam OpenList: before 4.2.4

References

• https://github.com/OpenListTeam/OpenList/commit/651da18da4c647d96648d4bb64462baac1c37e04
• https://github.com/OpenListTeam/OpenList/releases/tag/v4.2.4
• https://github.com/OpenListTeam/OpenList/security/advisories/GHSA-95cv-r8x4-vh75
• https://github.com/OpenListTeam/OpenList/security/advisories/GHSA-95cv-r8x4-vh75

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