---
title: "CVE-2026-90852: luben zstd-jni - Use After Free"
description: "luben zstd-jni <= 1.5.7-13 contains a use after free caused by improper handling in ZstdCompressCtx.loadDict, letting remote attackers execute code or cause crashes, exploit requires crafted input."
url: https://panop.io/threat-heartbeat/CVE-2026-90852/
---

# CVE-2026-90852 luben zstd-jni - Use After Free

luben zstd-jni <= 1.5.7-13 contains a use after free caused by improper handling in ZstdCompressCtx.loadDict, letting remote attackers execute code or cause crashes, exploit requires crafted input.

CVSS base score 7.3 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.54% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-90852)

## Details

Type

Use After Free

Impact

Remote Code Execution, Denial Of Service

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Published

15 September 2026

Updated

15 October 2026

Weakness

[CWE-119](https://cwe.mitre.org/data/definitions/119.html)

## Vendor fix

Upgrade to version 1.5.7-14.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-90852](https://nvd.nist.gov/vuln/detail/CVE-2026-90852)
- [https://vuldb.com/vuln/403407](https://vuldb.com/vuln/403407)
- [https://vuldb.com/vuln/403407/cti](https://vuldb.com/vuln/403407/cti)
- [https://github.com/luben/zstd-jni/](https://github.com/luben/zstd-jni/)
- [https://github.com/luben/zstd-jni/commit/a560131d7834598afd9cea6b7c107bc88e915936](https://github.com/luben/zstd-jni/commit/a560131d7834598afd9cea6b7c107bc88e915936)
- [https://github.com/luben/zstd-jni/issues/404](https://github.com/luben/zstd-jni/issues/404)
- [https://github.com/luben/zstd-jni/releases/tag/v1.5.7-14](https://github.com/luben/zstd-jni/releases/tag/v1.5.7-14)
- [https://vuldb.com/cve/CVE-2026-90852](https://vuldb.com/cve/CVE-2026-90852)
- [https://vuldb.com/submit/927022](https://vuldb.com/submit/927022)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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