---
cve: "CVE-2026-87877"
severity: "HIGH"
cvss: 7.0
epss: "0.2%"
vendor: "luben"
kev: false
exploited: false
published: "2026-09-09 15:17:28"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-21T10:44:01+02:00"
---

# CVE-2026-87877

> 7.0 HIGH · 🧪 PoC

## Beschreibung

zstd-jni versions before 1.5.7-14 fail to validate closed state in setDict, setLongMax, setLevel and setRefMultipleDDicts methods of stream classes. Attackers can call these methods on closed streams to write through freed native pointers, corrupting unrelated objects or crashing the JVM.

## CVSS-Vektor

```
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Lokal | good |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- 3216860eea289fbbae0b191c0a4fd8b72dad949c (Commit)

## Referenzen

- <https://github.com/luben/zstd-jni/security/advisories/GHSA-2jw3-mg7f-vw4q>
- <https://github.com/luben/zstd-jni/commit/f38f9a1563113d96d0fc38baee543f7457dd8a8e>
- <https://github.com/luben/zstd-jni/commit/393d7311766abbc285b149302c0fe1f94b16d555>
- <https://github.com/luben/zstd-jni/blob/v1.5.7-13/src/main/java/com/github/luben/zstd/BaseZstdBufferDecompressingStreamNoFinalizer.java>
- <https://github.com/luben/zstd-jni/blob/v1.5.7-13/src/main/java/com/github/luben/zstd/ZstdInputStreamNoFinalizer.java>
- <https://github.com/luben/zstd-jni/releases/tag/v1.5.7-14>
- <https://github.com/luben/zstd-jni/commit/0827ed02551bbd8d6f8e4bbff99d83bf50f91938>
- <https://github.com/luben/zstd-jni>
- <https://www.vulncheck.com/advisories/zstd-jni-1.3.8-4-through-1.5.7-13-use-after-free-via-setters-called-after-close>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-87877) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_