CVE-2026-84939

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Disabling localized lookup in previous versions also mitigates this.\n\nNote 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. 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Disabling localized lookup in previous versions also mitigates this.<br><br>Note that even in versions affected by this vulnerability, the files that can be loaded remain restricted by the <code>TemplateLoader</code> that FreeMarker is configured to use. In particular, <code>FileTemplateLoader</code> prevents attempts to traverse outside the <code>baseDir</code> specified in its constructor. Other <code>TemplateLoader</code> implementations may allow access outside their designated base directory, but they are still constrained by the underlying storage mechanism\u2014for 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."}]}], "references": [{"url": "https://lists.apache.org/thread/hrd7o2ylwkkswdyhyzllgqt0f80kyd5y", "tags": ["vendor-advisory"]}], "metrics": [{"other": {"type": "Textual description of severity", "content": {"text": "important"}}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "x_generator": {"engine": "Vulnogram 1.0.3"}}, "adp": [{"title": "CVE Program Container", "references": [{"url": "http://www.openwall.com/lists/oss-security/2026/09/08/2"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2026-09-10T05:12:21.258Z"}}, {"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.1, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2026-09-10T15:57:22.150692Z", "id": "CVE-2026-84939", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-10T15:58:02.810Z"}}]}}

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Disabling localized lookup in previous versions also mitigates this.\n\nNote 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. 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Disabling localized lookup in previous versions also mitigates this.<br><br>Note that even in versions affected by this vulnerability, the files that can be loaded remain restricted by the <code>TemplateLoader</code> that FreeMarker is configured to use. In particular, <code>FileTemplateLoader</code> prevents attempts to traverse outside the <code>baseDir</code> specified in its constructor. 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{"bugzilla": {"description": "org.apache.freemarker/freemarker: Apache FreeMarker: Path traversal via malformed locale identifier", "id": "2531282", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2531282"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "status": "draft"}, "cwe": "CWE-22", "details": ["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).\nThis issue affects Apache FreeMarker from 2.2.0 through 2.3.34.\nUsers are recommended to upgrade to version 2.3.35. Disabling localized lookup in previous versions also mitigates this.\nNote 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\u2014for 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.", "A flaw was found in Apache FreeMarker. A remote attacker could exploit a path traversal vulnerability in the template loading mechanism by providing a specially crafted, malformed locale identifier. This is possible if the localized lookup configuration setting is enabled, which is the default. This vulnerability could allow an attacker to access files outside the intended base directory, potentially leading to information disclosure or unauthorized file access, depending on the configured TemplateLoader."], "name": "CVE-2026-84939", "package_state": [{"cpe": "cpe:/a:redhat:exploit_intelligence:0", "fix_state": "Under investigation", "package_name": "exploit-intelligence/agent-client-rhel9", "product_name": "Exploit Intelligence"}, {"cpe": "cpe:/a:redhat:camel_quarkus:3", "fix_state": "Not affected", "package_name": "freemarker", "product_name": "Red Hat build of Apache Camel 4 for Quarkus 3"}, {"cpe": "cpe:/a:redhat:apicurio_registry:3", "fix_state": "Not affected", "package_name": "freemarker", "product_name": "Red Hat build of Apicurio Registry 3"}, {"cpe": "cpe:/a:redhat:build_keycloak:", "fix_state": "Affected", "package_name": "freemarker", "product_name": "Red Hat Build of Keycloak"}, {"cpe": "cpe:/a:redhat:build_keycloak:", "fix_state": "Affected", "package_name": "rhbk/keycloak-rhel9", "product_name": "Red Hat Build of Keycloak"}, {"cpe": "cpe:/a:redhat:quarkus:3", "fix_state": "Not affected", "package_name": "freemarker", "product_name": "Red Hat build of Quarkus"}, {"cpe": "cpe:/a:redhat:jboss_fuse:7", "fix_state": "Affected", "package_name": "freemarker", "product_name": "Red Hat Fuse 7"}, {"cpe": "cpe:/a:redhat:jboss_fuse:7", "fix_state": "Affected", "package_name": "freemarker-parser", "product_name": "Red Hat Fuse 7"}, {"cpe": "cpe:/a:redhat:red_hat_single_sign_on:7", "fix_state": "Affected", "package_name": "freemarker", "product_name": "Red Hat Single Sign-On 7"}], "public_date": "2026-09-10T05:07:24Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-84939\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-84939\nhttp://www.openwall.com/lists/oss-security/2026/09/08/2\nhttps://lists.apache.org/thread/hrd7o2ylwkkswdyhyzllgqt0f80kyd5y"], "statement": "This is an Important path traversal vulnerability in Apache FreeMarker, affecting Red Hat JBoss Fuse, Red Hat Build of Keycloak, and Red Hat Single Sign-On. An attacker can exploit this flaw by providing a malformed locale identifier when localized lookup is enabled by default, potentially accessing restricted files. While FileTemplateLoader limits traversal to its base directory, other TemplateLoader implementations may allow broader access, justifying the Important impact.", "threat_severity": "Important"}

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