Use After Free Affecting logstash-9.1-with-output-opensearch package, versions *


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.14% (4th percentile)

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  • Snyk IDSNYK-MINIMOSLATEST-LOGSTASH91WITHOUTPUTOPENSEARCH-18490215
  • published1 Aug 2026
  • disclosed30 Jul 2026

Introduced: 30 Jul 2026

NewCVE-2026-54522  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

There is no fixed version for Minimos:latest logstash-9.1-with-output-opensearch.

NVD Description

Note: Versions mentioned in the description apply only to the upstream logstash-9.1-with-output-opensearch package and not the logstash-9.1-with-output-opensearch package as distributed by Minimos. See How to fix? for Minimos:latest relevant fixed versions and status.

MessagePack for Ruby is an implementation of the MessagePack binary serialization format. Prior to 1.8.2, MessagePack::Buffer#clear in ext/msgpack/buffer.c leaves rmem_last, rmem_end, and rmem_owner stale after _msgpack_buffer_shift_chunk returns an rmem page to the shared pool, allowing a subsequent Buffer#write and a second MessagePack::Buffer to alias the page and disclose or corrupt cross-buffer data. This issue is fixed in version 1.8.2.

CVSS Base Scores

version 3.1