CVE-2026-89045

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.17% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 7.2% of scored records. A rank, not a probability.

NVD base score

5.1 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

NVD analysis status

Awaiting Analysis. NVD last modified this record on 2026-09-15.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-09-10 17:39Z1 MO AGO

Last updated

2026-09-15 14:54Z1 MO AGO

Reserved

2026-09-10

Assigning CNA

VulnCheck

Record state

PUBLISHED

Severity

Medium (CVSS 5.1)

CNA CVSS vector

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

Weaknesses

• CWE-835Loop with Unreachable Exit Condition ('Infinite Loop')Base

Data version

5.2

Document digest

ae302d34ff3e5f672e6fa2ea3141d1040ff9f6cdf8f8f8f824a22b6118791575

• github.comGitHub Security Advisory (GHSA-9jx2-gfp9-phfm)https://github.com/luben/zstd-jni/security/advisories/GHSA-9jx2-gfp9-phfmvendor-advisory
• github.comFix commit: reject a negative length in read and readInternalhttps://github.com/luben/zstd-jni/commit/dd08685ef913a32e76fb27f43470035c06758646patch
• github.comGuard that never checks a negative length at v1.5.7-13https://github.com/luben/zstd-jni/blob/v1.5.7-13/src/main/java/com/github/luben/zstd/ZstdInputStreamNoFinalizer.java#L133technical-description
• github.comzstd-jni v1.5.7-14 Release Noteshttps://github.com/luben/zstd-jni/releases/tag/v1.5.7-14release-notes
• github.comluben/zstd-jnihttps://github.com/luben/zstd-jniproduct
• www.vulncheck.comVulnCheck Advisory: zstd-jni 1.4.8-4 through 1.5.7-13 Denial of Service via Negative Lengthhttps://www.vulncheck.com/advisories/zstd-jni-1.4.8-4-through-1.5.7-13-denial-of-service-via-negative-lengththird-party-advisory