CVE-2026-127091

Description

Jadaptive Maverick Synergy Server before 3.0.33 and 3.1.x before 3.1.7, and Maverick Legacy Server before 1.8.1, contain an improper path equivalence flaw in VirtualFileFactory.canonicalisePath that bypasses mount-level access policy. Authenticated users can supply paths with duplicate separators or dot segments to route operations to a less restrictive parent mount and read or write files the child mount denies.

Severity scores

Each score is shown as its source gave it. They are not averaged or merged.

• 7.6CVSS 4.0, Highfrom the CNA (VulnCheck)CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
• 6.8CVSS 3.1, Mediumfrom the CNA (VulnCheck)CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

Historical context and remediation

This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.

No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.

No explicit remediation statement is available on this page yet. Consult the original record and vendor references before choosing a fix.

Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.

Read the original CVE record.

Affected products

Timeline

1. 13 Nov 2026 Published

Weakness

• CWE-41

References

• jadaptive.comvendor-advisory
• github.compatch
• Maverick Synergy Release Notesrelease-notes
• Maverick Legacy Server Release Notesrelease-notes
• github.comtechnical-description
• VulnCheck Advisory: Jadaptive Maverick Synergy Server before 3.0.33 and 3.1.x before 3.1.7, and Maverick Legacy Server before 1.8.1, VFS Mount Policy Bypass via Non-Canonical Pathsthird-party-advisory