CVE-2026-84939 GHSA-27j2-h3m2-8237 freemarker: Path traversal in template loading via malformed locale in doc-maven-plugin (2.3.22 -> 2.3.35) - #311
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vharseko merged 1 commit intoSep 25, 2026
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Bumps org.freemarker:freemarker from 2.3.22 to 2.3.35. --- updated-dependencies: - dependency-name: org.freemarker:freemarker dependency-version: 2.3.35 dependency-type: direct:production ... Signed-off-by: dependabot[bot] <support@github.com>
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Bumps
org.freemarker:freemarkerfrom 2.3.22 to 2.3.35 incommons/doc-maven-plugin/pom.xml, clearing Dependabot alert #111.Advisory
CVE-2026-84939 / GHSA-27j2-h3m2-8237 — Path traversal (CWE-23) in the FreeMarker template loading mechanism. If an attacker can pass an arbitrary malformed locale identifier to FreeMarker and localized lookup is enabled (the default), the localized template name built from that locale can escape the intended template path. What can be read is still bounded by the configured
TemplateLoader:FileTemplateLoaderstays inside itsbaseDir, a class-loader based loader can reach only what the class loader can load, a servlet-context loader only what the web application context exposes. 2.3.35 fixes the lookup (apache/freemarker@83953d9); disabling localized lookup mitigates older versions.AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N)org.freemarker:freemarker>= 2.2.0, <= 2.3.34Impact on commons
None at runtime, low in the build. FreeMarker is a dependency of
doc-maven-pluginonly, a Maven plugin that runs while documentation is built; it is not a dependency of any library artifact. The plugin uses it in two places —pre/ArtifactBuilder(artifact.ftl) andutils/OLinkUtils(olinkdb.ftl). Both create aConfigurationwithsetClassForTemplateLoading(..., "/templates")and load a fixed template name withconfiguration.getTemplate(name), i.e. with the JVM default locale. No external input chooses the locale, so the malformed locale the advisory requires cannot reach FreeMarker, and the class-path loader could only reach class-path resources anyway. The bump takes the plugin out of the vulnerable range.Change
org.freemarker:freemarker2.3.22→2.3.35incommons/doc-maven-plugin/pom.xml. Both call sites constructConfigurationwithConfiguration.DEFAULT_INCOMPATIBLE_IMPROVEMENTS(2.3.0), so the template-processing behaviour stays at the 2.3.0 compatibility level across the upgrade. No code change.References