Relative Path Traversal Affecting org.freemarker:freemarker-gae package, versions [2.2.0,2.3.35)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published10 Sept 2026
- disclosed10 Sept 2026
Introduced: 10 Sep 2026
NewCVE-2026-84939 (opens in a new tab)How to fix?
Upgrade org.freemarker:freemarker-gae to version 2.3.35 or higher.
Overview
Affected versions of this package are vulnerable to Relative Path Traversal through the ClassTemplateLoader and WebappTemplateLoader template-loading paths. An attacker can force loading of templates outside the intended base package or webapp subdirectory by supplying a malformed locale or template name that backs out with .. segments, causing FreeMarker to resolve unintended resources during localized lookup. This can let the attacker read templates or other loader-backed resources the configured TemplateLoader can reach, breaking application rendering and exposing content that should not be selected by template lookup.
Workarounds
- Disable localized lookup in FreeMarker configurations that are still on affected versions; this prevents the malformed-locale path traversal from being exercised during template lookup.