PT-2026-146889

CVE-2026-127031

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Publicado

2026-11-13

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Atualizado

2026-11-13

Descrição por

CVSS 4.0
7.7
Alta
MétricasAV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N
In Eclipse AAS4J before 3.0.1, XmlSchemaValidator.validateSchema() (and AASXValidator.validateSchema(), which calls it) validates untrusted XML with a default JAXP Validator that resolves external DTDs and external entities. An attacker who supplies a crafted AAS XML document or AASX package can read local files from the host, send their contents out-of-band to an attacker-controlled server, and make the validating process send arbitrary outbound requests (SSRF). Validation still returns no errors.
Details:
  • Vulnerable code: dataformat-xml/src/main/java/org/eclipse/digitaltwin/aas4j/v3/dataformat/xml/XmlSchemaValidator.java. schema.newValidator().validate(new StreamSource(...)) runs without ACCESS EXTERNAL DTD / ACCESS EXTERNAL SCHEMA restrictions and without disallow-doctype-decl.
  • Second entry point: dataformat-aasx/src/main/java/org/eclipse/digitaltwin/aas4j/v3/dataformat/aasx/AASXValidator.java. The AAS XML part of an .aasx package is passed unchanged to the vulnerable validator.
  • XmlDeserializer (Jackson/Woodstox) is not affected, because DTD support is disabled by default there.
  • Present since the initial import of the code base (commit cc9da52).
  • Fix: harden the validator by setting ACCESS EXTERNAL DTD and ACCESS EXTERNAL SCHEMA to "" and rejecting DOCTYPE declarations. The bundled AAS.xsd does not need DTDs, so no functionality is lost.
Explorabilidade
Correção
Fornecedores
Produtos afetados
Identificadores relacionados
CVE-2026-127031
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