CVE-2026-89045

zstd-jni 1.4.8-4 through 1.5.7-13 Denial of Service via Negative Length

MEDIUM
4
CVSS Score
Published: September 10, 2026 at 05:39 PM UTC
Updated: September 15, 2026 at 03:17 PM UTC
1 product affected across 1 vendorZstd Jni

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Severity
MEDIUM4
Exploit prediction
EPSS 0.2%
SSVC
PoC

Description

zstd-jni versions 1.4.8-4 through 1.5.7-13 fail to validate negative length parameters in ZstdInputStreamNoFinalizer.read(), allowing attackers to trigger infinite loops. Attackers can pass negative length values to cause the read method to spin indefinitely while holding the stream monitor, blocking all other threads from accessing the stream.

Affected

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

1.4.8-4 ≤ v < 1.5.7-141.4.8-4
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

SSVCPoCNot automatablePartial impact

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

CVSS

4MEDIUMVulnCheck
Attack Vector
LOCAL
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
LOW
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-835

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