Out-of-bounds Read in Luben Zstd-Jni
CVE-2026-89046
zstd-jni versions 1.5.5-6 through 1.5.7-13 contain an out-of-bounds read vulnerability in Zstd.getFrameContentSize that fails to validate negative srcPosition arguments. Attackers can supply negative offset values that bypass bounds checks and reach the native frame-header parser, causing out-of-bounds memory reads that lead to information disclosure or JVM crashes.
Vulnerability class: Buffer Overflow
CVSS v3 metric
CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H.
Affected products
Weakness classification (CWE)
References
- disclosure@vulncheck.com (vendor-advisory)
- disclosure@vulncheck.com (patch)
- disclosure@vulncheck.com (technical-description)
- disclosure@vulncheck.com (technical-description)
- disclosure@vulncheck.com (release-notes)
- disclosure@vulncheck.com (product)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2026-89046?
- CVE-2026-89046 is a high-severity vulnerability in Luben Zstd-Jni, classified under Out-of-bounds Read. CVSS score: 8.2/10. Published 2026-09-10.
- How severe is CVE-2026-89046?
- High severity. CVSS v3 base score is 8.2 out of 10.