All vulnerabilities
CVE-2026-109965

Serena before 2.0.0 Symlink Following in File Tools Allows Access Outside Project Root

oraios serena
Open in ThreatlineRecord JSON
CVSS
8.4High
ExploitationPublic exploit codeCISA's assessment says proof of concept code is public, assessed 13 Oct 2026. Not in the KEV catalogCISA via CVE List
Exploit odds (EPSS)0.22%Chance of exploitation activity in the next 30 days, higher than 12% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in2.0.0Fixed versionCVE List
Published13 Oct 2026Updated 13 Oct 2026CVE List

What fixes it

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

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.

Text from CVE List

Affected versions 1

  • serenaaffected: all versions before 2.0.0CVE List

References 6