CVSS 4.0
7.6 highCVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:NCVE-2026-127091 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 Paths
High (7.6) in jadaptive. EPSS 0.5% estimated probability of exploitation activity in the next 30 days.
On this page
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
CVSS 3.1
6.8 mediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N- EPSS
- 0.5% estimated probability of exploitation activity in the next 30 days; 43rd percentile. Scored 2026-11-13. A forecast for this CVE across the internet, not for your own systems.
- CWE
- CWE-41 Improper Resolution of Path Equivalence
- Published
- Modified
- Assigned by
- VulnCheck (CNA)
- NVD analysis
- Awaiting analysis
- Record from
- the NVD, synced
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Affected
- jadaptive:maverick legacy server
- jadaptive:maverick synergy server
Versions
From the CNA's record in the CVE List.
| Product | Affected |
|---|---|
| Jadaptive Maverick Synergy Server | before 3.0.33 |
| Jadaptive Maverick Synergy Server | from 3.1.0 before 3.1.7 |
| Jadaptive Maverick Legacy Server | before 1.8.1 |
Attack patterns (CAPEC)
- CAPEC-3 Using Leading 'Ghost' Character Sequences to Bypass Input Filters Likelihood: Medium · Severity: Medium
The attack patterns MITRE's CAPEC relates to this record's weaknesses, as MITRE names them. Credits.
References
- https://github.com/sshtools/maverick-synergy/blob/3.1.4/maverick-virtual-filesystem/src/main/java/com/sshtools/common/files/vfs/VirtualFileFactory.java#L189-L219
- https://github.com/sshtools/maverick-synergy/commit/f5531c21302d00901021bf2cb4dba7fca6436cfb
- https://jadaptive.com/security/advisories/JADAPTIVE-SA-2026-002
- https://store.jadaptive.com/app/api/releases/changes/01d04a39-0f05-4bae-842e-d2f1acc16985
- https://store.jadaptive.com/app/api/releases/changes/ff71bdcf-a2a2-47e0-af5a-22e15af1dfa4
- https://www.vulncheck.com/advisories/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-paths