Vulnerability in luben zstd-jni

[ Why it matters ]Priority signals

• Public proof-of-concept exploit exists (CISA SSVC)

[ Description ]Official description

zstd-jni versions 1.2.0 through 1.5.7-13 contain an out-of-bounds read vulnerability in the ZstdDictDecompress constructor because offset and length arguments are never validated against the dictionary array bounds. Attackers can supply arbitrary offset or length values to read memory past the end of the supplied array, potentially causing JVM termination.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• CERT-FR16 Oct 2026CERTFR-2026-AVI-1336

  Multiple vulnerabilities in IBM products Translated from French

  Multiple vulnerabilities have been discovered in IBM products. Some of them allow an attacker to cause remote arbitrary code execution, privilege escalation and remote denial of service.

  CVE-2026-14671CVE-2026-11548CVE-2022-22950+490 more CVEs
• BSI CERT-Bund6 Oct 2026WID-SEC-2026-3791

  IBM SPSS: Multiple vulnerabilities Translated from German

  Risk highCVE-2026-87795CVE-2026-87824CVE-2026-73334+7 more CVEs

[ References ]References

• github.com/luben/zstd-jni/issues/405issue-tracking
• github.com/luben/zstd-jniproduct
• github.com/luben/zstd-jni/commit/b74ab242d640c40897e62aab4c744ddfad1f915fpatch
• github.com/luben/zstd-jni/blob/v1.5.7-13/src/main/java/com/github/luben/zstd/ZstdDictDe…technical-description
• github.com/luben/zstd-jni/releases/tag/v1.5.7-14release-notes
• github.com/luben/zstd-jni/blob/v1.2.0/src/main/java/com/github/luben/zstd/ZstdDictDecom…technical-description
• www.vulncheck.com/advisories/zstd-jni-1.2.0-through-1.5.7-13-out-of-bounds-read-via-zst…third-party-advisory