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Fencer Vulns
medium 5.3

CVE-2026-106453 json

yawkat LZ4 Java: LZ4DecompressorWithLength allocates the unvalidated size from the 4-byte length header, so a 5-byte input triggers a 1 GiB allocation and OutOfMemoryError

published 2026-10-06 33 d ago modified 2026-10-07 32 d ago also GHSA-6cx8-rjf8-pr8g , EUVD-2026-93872

cvss
5.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 31%
public exploits
0
none known

Summary

yawkat LZ4 Java provides LZ4 compression for Java. Prior to 1.11.2, LZ4DecompressorWithLength uses getDecompressedLength to trust the four-byte decompressed-length header before validating the compressed input, allowing a five-byte attacker-supplied input whose header declares a large output size to request up to approximately 2 GiB and exhaust the JVM heap. Convenience overloads backed by LZ4FastDecompressor or LZ4SafeDecompressor allocate the untrusted size, while overloads that write to a caller-provided destination buffer are not affected because the caller controls the destination size. This issue is fixed in version 1.11.2.

Patch / fix

  • maven at.yawk.lz4:lz4-java 1.11.2
  • lz4-java Debian 14 1.11.2+ds1-1

debian advisories DEBIAN-CVE-2026-106453

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-106453 updated cvss 5.3

org.lz4/lz4-java: lz4-java: Denial of Service via untrusted decompressed length header

  • Red Hat OpenShift Developer Tools and Services jenkins-2-plugins, ocp-tools-4/jenkins-rhel8, ocp-tools-4/jenkins-rhel9 Red Hat build of Apache Camel 4 for Quarkus 3 lz4-java Red Hat build of Apache Camel for Spring Boot 4 lz4-java, liblz4-java.so Red Hat build of Apicurio Registry 3 lz4-java Red Hat build of Debezium 3 lz4-java
    affected: workaround, no fix available “Fix deferred”
  • Red Hat build of Quarkus lz4-java
    affected: workaround, no fix available
  • Red Hat Enterprise Linux 8 lz4-java, lz4-java-javadoc Red Hat Enterprise Linux 9 jmc
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Fuse 7 lz4-java
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Hardened Images maven3.9 Red Hat JBoss Enterprise Application Platform 8 lz4-java, liblz4-java.so Red Hat JBoss Enterprise Application Platform Expansion Pack lz4-java, liblz4-java.so Red Hat OpenShift AI (RHOAI) rhoai/odh-spark-operator-rhel9, rhoai/odh-th-torch-cpu-py312-rhel9, rhoai/odh-th-torch-cuda-py312-rhel9, rhoai/odh-th06-cpu-torch210-py312-rhel9, rhoai/odh-th06-cpu-torch291-py312-rhel9, rhoai/odh-th06-rocm64-torch291-py312-rhel9, +2 more
    affected: workaround, no fix available “Fix deferred”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
32 d ago

Exploit prediction

0.37% chance of exploitation in the next 30 days, higher than 31% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
GitHub 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Affected packages

ecosystem package affected fixed in
maven at.yawk.lz4:lz4-java
<1.11.2
1.11.2
maven org.lz4:lz4-java
<=1.8.1
 no fix listed

Affected products

  • yawkat lz4-java

Classification

Weakness
  • CWE-789 Memory Allocation with Excessive Size Value

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.