# CVE-2026-87824

## Summary

- **CVE ID:** CVE-2026-87824
- **Severity:** HIGH
- **CVSS Score:** 8.7 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N)
- **CWE:** CWE-125
- **Published:** Sep 9, 2026
- **Last Modified:** Sep 9, 2026

## Description

zstd-jni before 1.5.7-14 fails to validate the samples buffer capacity in Zstd.trainFromBufferDirect, allowing attackers to read past buffer boundaries by supplying oversized per-sample lengths. Attackers can trigger out-of-bounds memory access by providing crafted sample length arrays that cause the native implementation to walk past the buffer allocation, resulting in JVM termination.

## Affected Products

- luben — zstd-jni (1.3.3-1)

## References

- [CNA](https://github.com/luben/zstd-jni/security/advisories/GHSA-257p-3h6w-pg7h)
- [CNA](https://github.com/luben/zstd-jni/commit/bba6cfca2c0897f1fa004f4193247479f10da853)
- [CNA](https://github.com/luben/zstd-jni/blob/v1.5.7-13/src/main/native/jni_zdict.c)
- [CNA](https://github.com/luben/zstd-jni/blob/v1.5.7-13/src/main/java/com/github/luben/zstd/Zstd.java)
- [CNA](https://github.com/luben/zstd-jni/releases/tag/v1.5.7-14)
- [CNA](https://github.com/luben/zstd-jni/commit/53d3c6342883f7d6717b2477a7f9c1b4a4a56980)
- [CNA](https://github.com/luben/zstd-jni)
- [CNA](https://www.vulncheck.com/advisories/zstd-jni-1.3.3-1-through-1.5.7-13-out-of-bounds-read-via-zstd-trainfrombufferdirect)

---
_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._