{"id":"CVE-2026-88789","published":"2026-10-01T11:17:28.917","lastModified":"2026-10-01T15:17:32.640","description":"Improper Restriction of XML External Entity Reference in the XSLT support extension (camel-quarkus-support-xalan) in Apache Camel Quarkus from 3.2.0 before 3.33.3 and from 3.34.0 before 3.40.0 on all platforms allows an attacker who supplies the XML document being transformed to read local files or issue requests to internal network locations via an external entity declaration in that document.\n\nThe extension supplies its own Xalan-backed TransformerFactory to the xslt component and registers it as the JAXP default. Xalan-J 2.7.x predates JAXP 1.5 and does not honour javax.xml.XMLConstants.ACCESS_EXTERNAL_DTD or ACCESS_EXTERNAL_STYLESHEET, so the external access restrictions Apache Camel applies to the TransformerFactory it creates were not in effect. On the xslt component path this affects message bodies that reach the transformer already as a javax.xml.transform.Source; bodies of other types are converted to a SAXSource by Apache Camel with external entities and external DTD loading disabled, and are not affected. Because the factory is also the JAXP default, other code in the application obtaining one through TransformerFactory.newInstance() loses the same restrictions without error.\n\nApplications are affected if they use any of camel-quarkus-xslt, camel-quarkus-xslt-saxon, camel-quarkus-tika or camel-quarkus-xmlsecurity, each of which brings the XSLT support extension onto the classpath. For all but camel-quarkus-xslt, the exposure is limited to the JAXP default factory, since those extensions do not perform XSLT transformations themselves.\n\nUsers are recommended to upgrade to version 3.33.3 or 3.40.0, which fixes this issue.","cvssScore":8.6,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N","cwes":["CWE-611"],"vendors":[],"products":[],"references":[{"url":"https://camel.apache.org/security/CVE-2026-88789.html","tags":[]},{"url":"https://github.com/apache/camel-quarkus/commit/9a570b64977b0e24f85d67c2b2220aeac9fa5274","tags":[]},{"url":"https://github.com/apache/camel-quarkus/commit/9dd11779580cd88e4ab01b23717cd0167f26155c","tags":[]},{"url":"https://github.com/apache/camel-quarkus/issues/9115","tags":[]},{"url":"http://www.openwall.com/lists/oss-security/2026/10/01/1","tags":[]}],"exploitRefs":[{"url":"https://github.com/apache/camel-quarkus/commit/9a570b64977b0e24f85d67c2b2220aeac9fa5274","tags":[]},{"url":"https://github.com/apache/camel-quarkus/commit/9dd11779580cd88e4ab01b23717cd0167f26155c","tags":[]},{"url":"https://github.com/apache/camel-quarkus/issues/9115","tags":[]}],"hasPoc":true,"ai":{"summary":"This flaw allows attackers to read local files or make internal network requests via XML external entity declarations, posing a significant security risk due to the improper restriction of XML external entity references.","exploitability":"Exploitation is relatively straightforward for attackers who can supply the XML document being transformed, requiring preconditions such as control over the input document or the ability to inject malicious content.","blast_radius":"If exploited, this flaw could lead to unauthorized access to local files or network resources, potentially compromising sensitive data or internal systems.","remediation":"Upgrade to Apache Camel Quarkus 3.33.3 or later, or disable the affected XSLT support extension in the application configuration.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["xml-external-entity","file-read","internal-network"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-10-04T08:41:38.297Z"}}