Chronicle Wire v2026.8 Arbitrary Class Instantiation During YAML Deserialization via Externally Controlled YAML Type Tags

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Metadaten

  • Original (extern): Link oeffnen
  • Veroeffentlicht: 2026-08-26 15:30 UTC
  • Importiert: 2026-08-26 18:12 UTC
  • Quelle-ID: full_disc
  • uid_hash: 3e1632f848b3dd0cb5dbecdac584d062ae670b1b126e6ccb6cdd13c9140da737

Inhalt

Posted by Ron E on Aug 26 Chronicle Wire permits YAML type tags supplied within serialized input to

influence Java class selection and object instantiation during untyped

deserialization.

When applications deserialize attacker-controlled or otherwise untrusted

YAML through APIs such as readObject() or object(Object.class), an

externally controlled YAML type tag can identify a Java class that

Chronicle Wire resolves through its configured ClassLookup.

When the default...

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