CVE-2026-89046
Received Received - Intake

Zstd-JNI Out-of-Bounds Read in Frame Content Size

Publication date: 2026-09-10

Last updated on: 2026-09-10

Assigner: VulnCheck

Description
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.

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Meta Information

Published
2026-09-10
Last Modified
2026-09-10
Generated
2026-09-10
AI Q&A
2026-09-10
EPSS Evaluated
N/A
NVD
CVE-2026-89046
EUVD
EUVD-2026-75635

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
luben zstd-jni From 1.5.5-6 (inc) to 1.5.7-13 (inc)
zstd_jni zstd_jni From 1.5.5-6 (inc) to 1.5.7-13 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-125 The product reads data past the end, or before the beginning, of the intended buffer.

Attack-Flow Graph

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Executive Summary

This vulnerability is an out-of-bounds read in the zstd-jni library affecting versions 1.5.5-6 through 1.5.7-13. The issue occurs in the Zstd.getFrameContentSize function, which fails to validate negative values for the srcPosition argument. Attackers can exploit this by providing negative offsets that bypass bounds checks, leading to out-of-bounds memory reads. This can result in information disclosure or JVM crashes.

Detection Guidance

To detect this vulnerability, check the version of zstd-jni in use. Affected versions are 1.5.5-6 through 1.5.7-13. Run: java -jar your-application.jar -version or inspect dependency files like pom.xml (Maven) or build.gradle (Gradle) for zstd-jni version. If the version falls within the vulnerable range, the system is potentially exposed.

Impact Analysis

This vulnerability can impact you by allowing attackers to crash your Java Virtual Machine (JVM) through denial-of-service attacks. It may also lead to information disclosure if sensitive memory is accessed. Applications parsing untrusted compressed frames are particularly at risk.

Mitigation Strategies

Immediately update zstd-jni to version 1.5.7-14 or later, which includes a fix to reject negative source positions. If updating is not possible, restrict input handling to trusted sources only and implement additional bounds checking in application code before calling Zstd.getFrameContentSize.

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