CVE-2026-89046

zstd-jni 1.5.5-6 through 1.5.7-13 Out-of-Bounds Read via Negative Offset

HIGH
8.2
CVSS Score
Published: September 10, 2026 at 05:39 PM UTC
Updated: September 10, 2026 at 08:08 PM UTC
1 product affected across 1 vendorZstd Jni

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Severity
HIGH8.2
Exploit prediction
EPSS 0.7%
SSVC
PoC

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

1.5.5-6 ≤ v < 1.5.7-141.5.5-6
Affected range stops below 1.5.7-14, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCPoCAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.2HIGHVulnCheck
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-125

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