CVE-2025-12183: LZ4 Java Compression has Out-of-bounds memory operations which can cause DoS

CVE-2025-12183 · Severity: medium · CVSS 4 · Published 2025-11-28

Out-of-bounds memory operations in org.lz4:lz4-java 1.8.0 and earlier allow remote attackers to cause denial of service and read adjacent memory via untrusted compressed input.

Technologies: at.yawk.lz4:lz4-java (Maven), org.lz4:lz4-java (Maven). Vendors: Maven.

Quick answers

Is CVE-2025-12183 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2025-12183 being exploited in the wild.
How severe is CVE-2025-12183?
Medium severity, with a CVSS score of 4, published 28 November 2025.
Which products and versions are affected?
at.yawk.lz4:lz4-java (Maven) ECOSYSTEM:introduced=0,fixed=1.8.1; net.jpountz.lz4:lz4 (Maven) ECOSYSTEM:introduced=0,last_affected=1.3.0; org.lz4:lz4-java (Maven) ECOSYSTEM:introduced=0,fixed=1.8.1; org.lz4:lz4-pure-java (Maven) ECOSYSTEM:introduced=0,last_affected=1.8.0.
Is there a fix for CVE-2025-12183?
Yes. at.yawk.lz4:lz4-java (Maven): upgrade to 1.8.1 or later; org.lz4:lz4-java (Maven): upgrade to 1.8.1 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2025-12183?
Check whether you run at.yawk.lz4:lz4-java (Maven), net.jpountz.lz4:lz4 (Maven), org.lz4:lz4-java (Maven) or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • at.yawk.lz4:lz4-java (Maven): upgrade to 1.8.1 or later
    # set at.yawk.lz4:lz4-java to 1.8.1 in your pom.xml or build.gradle
  • org.lz4:lz4-java (Maven): upgrade to 1.8.1 or later
    # set org.lz4:lz4-java to 1.8.1 in your pom.xml or build.gradle

Affected products

  • at.yawk.lz4:lz4-java (Maven) ECOSYSTEM:introduced=0,fixed=1.8.1
  • net.jpountz.lz4:lz4 (Maven) ECOSYSTEM:introduced=0,last_affected=1.3.0
  • org.lz4:lz4-java (Maven) ECOSYSTEM:introduced=0,fixed=1.8.1
  • org.lz4:lz4-pure-java (Maven) ECOSYSTEM:introduced=0,last_affected=1.8.0

Identifiers

  • CVE-2025-12183
  • GHSA-vqf4-7m7x-wgfc

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