CVE-2026-103088 Handlebars.java - Path Traversal

Handlebars.java before 4.5.5 contains a path traversal caused by inconsistent percent-encoding validation in template location handling, letting attackers read files outside the configured template base directory, exploit requires a Spring MVC application with file: template prefix and request-derived view name.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.69% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Path Traversal
Impact
File System Read, Information Disclosure
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Published
30 September 2026
Updated
15 October 2026
Weakness
CWE-24

Vendor fix

Upgrade to version 4.5.5 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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