CVE-2026-89045

MEDIUMPre-NVD 4.04.0—
EchelonGraph scoreHIGH confidence

Score 4.0 from GitHub Security Advisory published 2026-09-10. a secondary CVSS source baseline 4.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
4.0EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.0Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
4.0
EG Score
4.0(high)
EG Risk
34(Track)
EG Risk 34/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity40% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
3%
KEV
Not listed

Published

September 10, 2026

Last Modified

September 15, 2026

Advisory Details (5)

Auto-updated Sep 10, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_commit.
generic

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

https://www.vulncheck.com/advisories/zstd-jni-1.4.8-4-through-1.5.7-13-denial-of-service-via-negative-length
generic

GitHub - luben/zstd-jni: JNI binding for Zstd · GitHub

https://github.com/luben/zstd-jni
generic

zstd-jni/src/main/java/com/github/luben/zstd/ZstdInputStreamNoFinalizer.java at v1.5.7-13 · luben/zstd-jni · GitHub

https://github.com/luben/zstd-jni/blob/v1.5.7-13/src/main/java/com/github/luben/zstd/ZstdInputStreamNoFinalizer.java#L133
github_commit

commit dd08685ef913 (luben/zstd-jni)

Fix landed in luben/zstd-jni commit dd08685ef913 — awaiting tagged release

https://github.com/luben/zstd-jni/commit/dd08685ef913a32e76fb27f43470035c06758646
github Patch Available🟡 PoC Available

Infinite Loop via Negative Length in ZstdInputStreamNoFinalizer.read() · Advisory · luben/zstd-jni · GitHub

https://github.com/luben/zstd-jni/security/advisories/GHSA-9jx2-gfp9-phfm

Vendor Advisories for CVE-2026-89045(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 23× in last 7d / 35× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-19 06:11 UTCEG score recompute
  2. 2026-09-19 06:10 UTCGHSA enrichment
  3. 2026-09-18 19:28 UTCEPSS rescore
  4. 2026-09-18 08:31 UTCEG score recompute
  5. 2026-09-18 08:31 UTCGHSA enrichment
  6. 2026-09-17 19:32 UTCEPSS rescore
  7. 2026-09-17 10:53 UTCEG score recompute
  8. 2026-09-17 10:53 UTCGHSA enrichment
  9. 2026-09-16 14:09 UTCEPSS rescore
  10. 2026-09-16 13:15 UTCEG score recompute
  11. 2026-09-16 13:14 UTCGHSA enrichment
  12. 2026-09-16 05:15 UTCEPSS rescore
  13. 2026-09-15 15:33 UTCEG score recompute
  14. 2026-09-15 15:33 UTCGHSA enrichment
  15. 2026-09-15 15:02 UTCEG score recompute
  16. 2026-09-15 15:02 UTCGHSA enrichment
  17. 2026-09-15 08:12 UTCEG score recompute
  18. 2026-09-15 08:12 UTCGHSA enrichment
  19. 2026-09-15 03:12 UTCEPSS rescore
  20. 2026-09-14 10:34 UTCEG score recompute
  21. 2026-09-14 10:33 UTCGHSA enrichment
  22. 2026-09-13 16:48 UTCEPSS rescore
  23. 2026-09-13 12:53 UTCGHSA enrichment
  24. 2026-09-12 15:15 UTCEG score recompute
  25. 2026-09-12 15:15 UTCGHSA enrichment
Show 10 more
  1. 2026-09-12 15:02 UTCEPSS rescore
  2. 2026-09-11 17:37 UTCEG score recompute
  3. 2026-09-11 17:37 UTCGHSA enrichment
  4. 2026-09-11 14:53 UTCEPSS rescore
  5. 2026-09-11 14:53 UTCEPSS rescore
  6. 2026-09-10 19:58 UTCEG score recompute
  7. 2026-09-10 19:58 UTCGHSA enrichment
  8. 2026-09-10 18:22 UTCEG score recompute
  9. 2026-09-10 17:45 UTCEG score recompute
  10. 2026-09-10 17:44 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-89045?
CVE-2026-89045 is a medium vulnerability published on September 10, 2026. 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,…
When was CVE-2026-89045 disclosed?
CVE-2026-89045 was first published in the National Vulnerability Database on September 10, 2026, with the most recent update on September 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-89045 actively exploited?
CVE-2026-89045 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 97.5% of all scored CVEs.
What is the CVSS score of CVE-2026-89045?
CVE-2026-89045 has a CVSS v3 base score of 4.0 (NVD).
How do I remediate CVE-2026-89045?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-89045, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-89045

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