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Improper Input Validation Affecting logstash-9.4 package, versions <9.4.5-r3

Severity

 Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.29% (22nd percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-LOGSTASH94-19385545
  • published28 Aug 2026
  • disclosed18 Aug 2026
Report a new vulnerability Found a mistake?

Introduced: 18 Aug 2026

NewCVE-2026-63335  (opens in a new tab)
CWE-20  (opens in a new tab)

How to fix?

Upgrade Chainguard logstash-9.4 to version 9.4.5-r3 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream logstash-9.4 package and not the logstash-9.4 package as distributed by Chainguard. See How to fix? for Chainguard relevant fixed versions and status.

The RabbitMQ Java client library allows Java and JVM-based applications to connect to and interact with RabbitMQ nodes. Prior to 5.31.0, inbound AMQP command assembly in src/main/java/com/rabbitmq/client/impl/CommandAssembler.java processes a content-bearing method and header whose remainingBodyBytes value is smaller than a following AMQP.FRAME_BODY payload. CommandAssembler.consumeBodyFrame subtracts the peer-controlled payload length before validating that it fits, drives remainingBodyBytes negative, and throws a raw UnsupportedOperationException instead of MalformedFrameException. A malicious or compromised broker peer can send this malformed sequence on an open nonzero channel to terminate frame processing and close the client connection, causing denial of service for work using that connection. This issue is fixed in version 5.31.0.