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Fencer Vulns
high 8.2

CVE-2026-87795 json

zstd-jni 1.2.0 through 1.5.7-13 Out-of-Bounds Read via ZstdDictCompress

published 2026-09-09 2 mo ago modified 2026-09-14 55 d ago also EUVD-2026-74791

cvss
8.2
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 50%
public exploits
0
none known

Summary

zstd-jni versions before 1.5.7-14 fail to validate offset and length parameters in the ZstdDictCompress constructor, allowing out-of-bounds memory reads. Attackers can supply untrusted offset or length values to read native heap memory into the compression dictionary, typically causing JVM crashes.

Patch / fix

  • luben zstd-jni 1.5.7-14
  • zstd-jni-java Debian 14 1.5.7-23+ds-1

debian advisories DEBIAN-CVE-2026-87795

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-2026-87795 updated cvss 8.2

com.github.luben/zstd-jni: zstd-jni: Out-of-bounds read in ZstdDictCompress constructor leads to denial of service

  • Red Hat Exploit Intelligence exploit-intelligence/agent-client-rhel9 Red Hat OpenShift Developer Tools and Services jenkins-2-plugins 4.19.1758207171-1.el9 Red Hat build of Apache Camel 4 for Quarkus 3 zstd-jni 1.5.7-7 Red Hat build of Apicurio Registry 3 zstd-jni 1.5.7-7 Red Hat build of Debezium 3 zstd-jni 1.5.7-7 Red Hat Ceph Storage 9 liborc, liborc2, libarrow, parquet-libs
    +2 more products
    Red Hat Enterprise Linux 9 jmc Red Hat JBoss Enterprise Application Platform Expansion Pack zstd-jni 1.5.7-7
    affected: workaround, no fix available “Update com.github.luben/zstd-jni to version 1.5.7-14 or later. Until updated, do not pass attacker-controlled offset or length values to ZstdDictCompress.”
  • Red Hat OpenShift Developer Tools and Services 4.12 ocp-tools-4/jenkins-rhel8 1792044326
    fixed: vendor fix “Update com.github.luben/zstd-jni to version 1.5.7-14 or later. Until updated, do not pass attacker-controlled offset or length values to ZstdDictCompress.” RHSA-2026:88152
  • Red Hat OpenShift Developer Tools and Services 4.13 ocp-tools-4/jenkins-rhel8 1792044327
    fixed: vendor fix “Update com.github.luben/zstd-jni to version 1.5.7-14 or later. Until updated, do not pass attacker-controlled offset or length values to ZstdDictCompress.” RHSA-2026:88149
  • Red Hat OpenShift Developer Tools and Services 4.14 ocp-tools-4/jenkins-rhel8 1792044382
    fixed: vendor fix “Update com.github.luben/zstd-jni to version 1.5.7-14 or later. Until updated, do not pass attacker-controlled offset or length values to ZstdDictCompress.” RHSA-2026:88151
  • Red Hat OpenShift Developer Tools and Services 4.15 ocp-tools-4/jenkins-rhel8 1792044386
    fixed: vendor fix “Update com.github.luben/zstd-jni to version 1.5.7-14 or later. Until updated, do not pass attacker-controlled offset or length values to ZstdDictCompress.” RHSA-2026:88150
  • Red Hat OpenShift Developer Tools and Services 4.16 ocp-tools-4/jenkins-rhel9 1792040287
    fixed: vendor fix “Update com.github.luben/zstd-jni to version 1.5.7-14 or later. Until updated, do not pass attacker-controlled offset or length values to ZstdDictCompress.” RHSA-2026:88156
  • Red Hat OpenShift Developer Tools and Services 4.17 ocp-tools-4/jenkins-rhel9 1792040131
    fixed: vendor fix “Update com.github.luben/zstd-jni to version 1.5.7-14 or later. Until updated, do not pass attacker-controlled offset or length values to ZstdDictCompress.” RHSA-2026:88159
  • Red Hat OpenShift Developer Tools and Services 4.18 ocp-tools-4/jenkins-rhel9 1792041514
    fixed: vendor fix “Update com.github.luben/zstd-jni to version 1.5.7-14 or later. Until updated, do not pass attacker-controlled offset or length values to ZstdDictCompress.” RHSA-2026:88153
show 14 more
  • Red Hat OpenShift Developer Tools and Services 4.19 ocp-tools-4/jenkins-rhel9 1792040733
    fixed: vendor fix “Update com.github.luben/zstd-jni to version 1.5.7-14 or later. Until updated, do not pass attacker-controlled offset or length values to ZstdDictCompress.” RHSA-2026:88158
  • Red Hat OpenShift Developer Tools and Services 4.20 ocp-tools-4/jenkins-rhel9 1792040081
    fixed: vendor fix “Update com.github.luben/zstd-jni to version 1.5.7-14 or later. Until updated, do not pass attacker-controlled offset or length values to ZstdDictCompress.” RHSA-2026:88157
  • Red Hat OpenShift Developer Tools and Services 4.21 ocp-tools-4/jenkins-rhel9 1792040096
    fixed: vendor fix “Update com.github.luben/zstd-jni to version 1.5.7-14 or later. Until updated, do not pass attacker-controlled offset or length values to ZstdDictCompress.” RHSA-2026:88155
  • Red Hat OpenShift Developer Tools and Services 4.22 ocp-tools-4/jenkins-rhel9 1792040428
    fixed: vendor fix “Update com.github.luben/zstd-jni to version 1.5.7-14 or later. Until updated, do not pass attacker-controlled offset or length values to ZstdDictCompress.” RHSA-2026:88154
  • Red Hat Build of Apache Camel 3.33.3.SP2 zstd-jni 1.5.7.16-rhel8-redhat-00001
    fixed: vendor fix “Update com.github.luben/zstd-jni to version 1.5.7-14 or later. Until updated, do not pass attacker-controlled offset or length values to ZstdDictCompress.” RHSA-2026:70257
  • Red Hat build of Apache Camel 4.18.4 for Spring Boot 3.5.16
    fixed: vendor fix “Update com.github.luben/zstd-jni to version 1.5.7-14 or later. Until updated, do not pass attacker-controlled offset or length values to ZstdDictCompress.” RHSA-2026:71675
  • Red Hat build of Quarkus 3.27.5.SP2
    fixed: vendor fix “Update com.github.luben/zstd-jni to version 1.5.7-14 or later. Until updated, do not pass attacker-controlled offset or length values to ZstdDictCompress.” RHSA-2026:69470
  • Red Hat build of Quarkus 3.33.3.SP2
    fixed: vendor fix “Update com.github.luben/zstd-jni to version 1.5.7-14 or later. Until updated, do not pass attacker-controlled offset or length values to ZstdDictCompress.” RHSA-2026:69440
  • Red Hat JBoss Enterprise Application Platform 8.1
    fixed: vendor fix “Update com.github.luben/zstd-jni to version 1.5.7-14 or later. Until updated, do not pass attacker-controlled offset or length values to ZstdDictCompress.” RHSA-2026:95221
  • Red Hat OpenShift AI 3.4 rhoai/odh-th06-cpu-torch210-py312-rhel9 1791874335, rhoai/odh-th06-rocm64-torch291-py312-rhel9 1791872119, rhoai/odh-th06-cuda130-torch210-py312-rhel9 1791961113
    fixed: vendor fix “Update com.github.luben/zstd-jni to version 1.5.7-14 or later. Until updated, do not pass attacker-controlled offset or length values to ZstdDictCompress.” RHSA-2026:84734
  • Red Hat OpenShift Developer Tools and Services 4.12 ocp-tools-4/jenkins-agent-base-rhel8 1792044376 Red Hat OpenShift Developer Tools and Services 4.13 ocp-tools-4/jenkins-agent-base-rhel8 1792044361 Red Hat OpenShift Developer Tools and Services 4.14 ocp-tools-4/jenkins-agent-base-rhel8 1792044402 Red Hat OpenShift Developer Tools and Services 4.15 ocp-tools-4/jenkins-agent-base-rhel8 1792044379 Red Hat OpenShift Developer Tools and Services 4.16 ocp-tools-4/jenkins-agent-base-rhel9 1792040156 Red Hat OpenShift Developer Tools and Services 4.17 ocp-tools-4/jenkins-agent-base-rhel9 1792040149
    +6 more products
    Red Hat OpenShift Developer Tools and Services 4.18 ocp-tools-4/jenkins-agent-base-rhel9 1792041201 Red Hat OpenShift Developer Tools and Services 4.19 ocp-tools-4/jenkins-agent-base-rhel9 1792040114 Red Hat OpenShift Developer Tools and Services 4.20 ocp-tools-4/jenkins-agent-base-rhel9 1792040274 Red Hat OpenShift Developer Tools and Services 4.21 ocp-tools-4/jenkins-agent-base-rhel9 1792039948 Red Hat OpenShift Developer Tools and Services 4.22 ocp-tools-4/jenkins-agent-base-rhel9 1792040297 Red Hat Build of Apache Camel 3.33.3.SP2 jimfs 1.1, jna 5.8.0, bcel 6.7.0, gax 2.74.1, icu4j 78.2, joni 2.2.6, +1616 more
    not affected: vulnerable code not present
  • Red Hat Enterprise Linux 8 apache-commons-compress, apache-commons-compress-javadoc
    not affected: component not present
  • Red Hat Fuse 7 zstd-jni 1.5.7-7
    not affected: vulnerable code not in execute path
  • Red Hat Hardened Images maven3.9 3.9.16-0.2.hum1
    not affected: component not present

3 more not affected in the full advisory

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
Proof of concept is public
Automatable
yes
Technical impact
partial
Assessed
55 d ago

Exploit prediction

0.63% chance of exploitation in the next 30 days, higher than 50% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/luben/zstd-jni/security/advisories/GHSA-ff36-7w3w-g8rm referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 4.0 8.8 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N
CNA 3.1 8.2 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
CNA 4.0 8.8 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected products

  • luben zstd-jni

Classification

Weakness

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.