CVE-2026-21945

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-01-21. a secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 7.5Exploit: NoneExposed: 0

A fix is available — apply it.

Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: Security). Supported versions that are affected are Oracle Java SE: 8u471, 8u471-b50, 8u471-perf, 11.0.29, 17.0.17, 21.0.9, 25.0.1; Oracle GraalVM for JDK: 17.0.17 and 21.0.9; Oracle GraalVM Enterprise Edition: 21.3.16. Easily exploitable vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition. Note: This vulnerability applies to Java deployments, typically in clients running sandboxed Java Web Start applications or sandboxed Java applets, that load and run untrusted code (e.g., code that comes from the internet) and rely on the Java sandbox for security. This vulnerability does not apply to Java deployments, typically in servers, that load and run only trusted code (e.g., code installed by an administrator). CVSS 3.1 Base Score 7.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
49(Track)
EG Risk 49/100SSVC: 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
Severity75% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
54.9%
KEV
Not listed

Published

January 20, 2026

Last Modified

July 15, 2026

Advisory Details (9)

Auto-updated Jul 3, 2026
Patch available. Sources: redhat.
redhat Patch Available

Affected: Red Hat Enterprise Linux 7 Extended Lifecycle Support.

https://access.redhat.com/errata/RHSA-2026:0931
redhat Patch Available

Affected: Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9.4 Extended Update Support, Red Hat Enterprise Linux 9.6 Extended Update

https://access.redhat.com/errata/RHSA-2026:0928
redhat Patch Available

Affected: Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions, Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update

https://access.redhat.com/errata/RHSA-2026:0927
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:0901
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:0899
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:0897
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:0895
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:0848
redhat Patch Available

Affected: Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, and Red Hat Enterprise Linux 9.

https://access.redhat.com/errata/RHSA-2026:0847

Vendor Advisories for CVE-2026-21945(1)

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

Patch Availability(25)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuopenjdk-8-source (8u482-ga~us1-0ubuntu1~20.04) @ focal2026-05-21ubuntu
ubuntuopenjdk-11-source (11.0.30+7-1ubuntu1~20.04) @ focal2026-05-21ubuntu
ubuntuopenjdk-21-testsupport (21.0.10+7-1~20.04) @ focal2026-05-21ubuntu
ubuntuopenjdk-21-crac-testsupport (21.0.10+7-0ubuntu1~25.10) @ questing2026-05-21ubuntu
ubuntuopenjdk-17-crac-source (17.0.18+8-0ubuntu1~25.10) @ questing2026-05-21ubuntu
ubuntuopenjdk-25-testsupport (25.0.2+10-1~25.10) @ questing2026-05-21ubuntu
ubuntuopenjdk-25-crac-testsupport (25.0.2+10-0ubuntu1~25.10) @ questing2026-05-21ubuntu
ubuntuopenjdk-17-source (17.0.18+8-1~24.04.1) @ noble2026-05-21ubuntu
redhatjava-1.8.0-ibm-1:1.8.0.8.60-1.el8_102026-03-17redhat
redhatjava-25-openjdk-windows2026-02-02redhat
redhatjava-1.8.0-openjdk-portable2026-01-26redhat
redhatjava-1.8.0-openjdk-1:1.8.0.482.b08-1.el92026-01-26redhat
redhatjava-25-openjdk-1:25.0.2.0.10-1.el92026-01-26redhat
redhatjava-17-openjdk-windows2026-01-26redhat
redhatjava-1.8.0-openjdk-windows2026-01-26redhat
redhatjava-21-openjdk-windows2026-01-26redhat
redhatjava-21-openjdk-portable2026-01-26redhat
redhatjava-1.8.0-openjdk-1:1.8.0.482.b08-1.el7_92026-01-26redhat
redhatjava-17-openjdk-portable2026-01-26redhat
redhatjava-25-openjdk-portable2026-01-26redhat
redhatjava-17-openjdk-1:17.0.18.0.8-1.el92026-01-22redhat
redhatjava-21-openjdk-1:21.0.10.0.7-1.el92026-01-22redhat
redhatjava-11-openjdk-portable2026-01-21redhat
redhatjava-11-openjdk-1:11.0.30.0.7-1.el92026-01-21redhat
redhatjava-11-openjdk-windows2026-01-21redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(2)

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

All Vendor Advisories

(25)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 14× in last 7d / 48× 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.

Showing the most recent 100 of 117 total refreshes for this CVE.

  1. 2026-07-25 14:17 UTCEPSS rescore
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  6. 2026-07-23 03:06 UTCEG score recompute
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  1. 2026-07-12 05:46 UTCEPSS rescore
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  4. 2026-07-09 19:47 UTCOSV refresh
  5. 2026-07-09 19:10 UTCEPSS rescore
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  8. 2026-07-07 13:46 UTCEPSS rescore
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  27. 2026-06-22 14:25 UTCEPSS rescore
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  29. 2026-06-21 14:56 UTCEPSS rescore
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  31. 2026-06-21 05:41 UTCOSV refresh
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Frequently asked(5)

What is CVE-2026-21945?
CVE-2026-21945 is a high vulnerability published on January 20, 2026. Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: Security). Supported versions that are affected are Oracle Java SE: 8u471, 8u471-b50, 8u471-perf, 11.0.29, 17.0.17, 21.0.9, 25.0.1; Oracle GraalVM for JDK: 17.0.17…
When was CVE-2026-21945 disclosed?
CVE-2026-21945 was first published in the National Vulnerability Database on January 20, 2026, with the most recent update on July 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-21945 actively exploited?
CVE-2026-21945 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 54.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-21945?
CVE-2026-21945 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-21945?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-21945, 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

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