Vulnerability in Luben Zstd-Jni
CVE-2026-89045
zstd-jni versions 1.4.8-4 through 1.5.7-13 fail to validate negative length parameters in ZstdInputStreamNoFinalizer.read(), allowing attackers to trigger infinite loops. Attackers can pass negative length values to cause the read method to spin indefinitely while holding the stream monitor, blocking all other threads from accessing the stream.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.0 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.002 (7.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 7th percentile — 7.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/luben/zstd-jni/security/advisories/GHSA-9jx2-gfp9-phfm (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/releases/tag/v1.5.7-14 (release-notes)
- github.com/luben/zstd-jni (product)
- www.vulncheck.com/advisories/zstd-jni-1.4.8-4-through-1.5.7-13-denial-of-servic… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-89045?
- CVE-2026-89045 is a medium-severity vulnerability in Luben Zstd-Jni, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 4.0/10. Published 2026-09-10.
- How severe is CVE-2026-89045?
- Medium severity. CVSS v3 base score is 4.0 out of 10.