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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.006 (50.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 50.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/luben/zstd-jni/security/advisories/GHSA-rm53-6wf5-f34m (vendor-advisory)
- github.com/luben/zstd-jni/commit/dd08685ef913a32e76fb27f43470035c06758646 (patch)
- github.com/luben/zstd-jni/blob/v1.5.7-13/src/main/java/com/github/luben/zstd/Zs… (technical-description)
- github.com/luben/zstd-jni/blob/v1.5.7-13/src/main/native/jni_zstd.c (technical-description)
- github.com/luben/zstd-jni/releases/tag/v1.5.7-14 (release-notes)
- github.com/luben/zstd-jni (product)
- www.vulncheck.com/advisories/zstd-jni-1.5.5-6-through-1.5.7-13-out-of-bounds-re… (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.