CVE-2026-109965
Serena before 2.0.0 Symlink Following in File Tools Allows Access Outside Project Root
- State
- Published
- Severity
- 8.4 High
- Published
- Oct 13, 2026
- Updated
- Oct 13, 2026
- Reserved
- Oct 13, 2026
Description
Serena before 2.0.0 contains an improper link resolution vulnerability that allows attackers to access files outside the project root by committing symlinks inside a repository. Project.is_path_in_project() normalizes paths lexically without resolving symlinks, so file tools like read_file and create_text_file can read or overwrite files such as SSH keys or cloud credentials.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.4 High | CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 7.1 High | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N | VulnCheck |
Weaknesses
- CWE-59 Improper Link Resolution Before File Access ('Link Following')
Affected Products
| Product | Versions |
|---|---|
serenaoraios |
|
References
- https://github.com/oraios/serena/issues/2144issue-tracking
- https://github.com/oraios/serena/commit/6f20f9b822d85bb063008e786f808d04619dd54epatch
- serena v2.0.0 Release Notesrelease-notes
- https://github.com/oraios/serena/blob/v1.7.0/src/serena/project.pytechnical-description
- https://github.com/oraios/serenaproduct
- VulnCheck Advisory: Serena before 2.0.0 Symlink Following in File Tools Allows Access Outside Project Rootthird-party-advisory
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