All vulnerabilities
CVE-2026-84939GHSA-27j2-h3m2-8237

org.freemarker:freemarker: Apache FreeMarker template loading mechanism vulnerable to path traversal

Apache Software Foundation org.freemarker:freemarkermavenLibraries & packages
Open in ThreatlineRecord JSON
CVSS
9.1Critical
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.85%Chance of exploitation activity in the next 30 days, higher than 57% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in2.3.35Fixed versionGitHub
Published10 Sep 2026Updated 24 Sep 2026CVE List

What fixes it

  • 2.3.35org.freemarker:freemarker, mavenGitHub<dependency><groupId>org.freemarker</groupId><artifactId>freemarker</artifactId><version>2.3.35</version></dependency>
  • 2.3.35org.freemarker:freemarker, MavenOSV<dependency><groupId>org.freemarker</groupId><artifactId>freemarker</artifactId><version>2.3.35</version></dependency>

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

Path traversal vulnerability in Apache FreeMarker template loading mechanism, if the attacker can specify an arbitrary malformed locale identifier to FreeMarker, and the localized lookup configuration setting is enabled (it's by default enabled).

This issue affects Apache FreeMarker from 2.2.0 through 2.3.34.

Users are recommended to upgrade to version 2.3.35. Disabling localized lookup in previous versions also mitigates this.

Note that even in versions affected by this vulnerability, the files that can be loaded remain restricted by the TemplateLoader that FreeMarker is configured to use. In particular, FileTemplateLoader prevents attempts to traverse outside the baseDir specified in its constructor. Other TemplateLoader implementations may allow access outside their designated base directory, but they are still constrained by the underlying storage mechanism—for example, a loader wrapping a Java class loader can only access resources that the class loader can load, while one wrapping a web application context can only access resources available through that context.

Text from GitHub Advisory Database

Affected versions 30

  • org.freemarker:freemarker, maven>= 2.2.0, <= 2.3.34GitHub
  • Apache FreeMarkeraffected: 2.2.0 through 2.3.34CVE List
  • Apache FreeMarkerunaffected: 2.3.35CVE List
  • org.freemarker:freemarker, Mavenfrom 2.2.0, fixed in 2.3.35OSV
  • org.freemarker:freemarker, Maven2.3.10OSV
  • org.freemarker:freemarker, Maven2.3.11OSV
  • org.freemarker:freemarker, Maven2.3.12OSV
  • org.freemarker:freemarker, Maven2.3.13OSV
  • org.freemarker:freemarker, Maven2.3.14OSV
  • org.freemarker:freemarker, Maven2.3.15OSV
  • org.freemarker:freemarker, Maven2.3.16OSV
  • org.freemarker:freemarker, Maven2.3.17OSV
  • org.freemarker:freemarker, Maven2.3.18OSV
  • org.freemarker:freemarker, Maven2.3.19OSV
  • org.freemarker:freemarker, Maven2.3.20OSV
  • org.freemarker:freemarker, Maven2.3.21OSV
  • org.freemarker:freemarker, Maven2.3.22OSV
  • org.freemarker:freemarker, Maven2.3.23OSV
  • org.freemarker:freemarker, Maven2.3.24-incubatingOSV
  • org.freemarker:freemarker, Maven2.3.25-incubatingOSV
  • org.freemarker:freemarker, Maven2.3.26-incubatingOSV
  • org.freemarker:freemarker, Maven2.3.27-incubatingOSV
  • org.freemarker:freemarker, Maven2.3.28OSV
  • org.freemarker:freemarker, Maven2.3.29OSV
  • org.freemarker:freemarker, Maven2.3.30OSV
  • org.freemarker:freemarker, Maven2.3.31OSV
  • org.freemarker:freemarker, Maven2.3.32OSV
  • org.freemarker:freemarker, Maven2.3.33OSV
  • org.freemarker:freemarker, Maven2.3.34OSV
  • org.freemarker:freemarker, Maven2.3.9OSV

References 5