CVE Watch13 de nov. de 2026

CVE-2026-126839

A deserialization type-restriction control in the BSON serialization component can be bypassed because the check used to recognize a class o

CVSS

4.2

Média

EPSS

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KEV

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Exploit Today

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0-100

Publicado: 13 de nov. de 2026 · Última mod.: 13 de nov. de 2026 · CWE-502

EPSS · 30d

Ainda não há histórico EPSS suficiente.

Descrição técnica

A deserialization type-restriction control in the BSON serialization component can be bypassed because the check used to recognize a class of compiler-generated types relies on an overly permissive heuristic rather than a precise identification. An unauthorized party able to supply BSON content that an application later deserializes into a loosely typed member can cause types outside the intended allow-list to be constructed and populated with unauthorized party-supplied values inside the consuming application. This can lead to unexpected object state and errors in downstream application logic. No elevated privileges beyond the ability to place unauthorized party-influenced content in the deserialization path are required.

Referências oficiais

jira.mongodb.orghttps://jira.mongodb.org/browse/CSHARP-6169

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