major vulnerability· requires attention

Oracle GraalVM is an enterprise Java runtime; unauthenticated remote takeover risk across many organizations warrants broad notice.

Applications

CVE-2026-87288

8.1

High

EPSS 0.37%

Unauthenticated HTTP flaw allows remote takeover of Oracle GraalVM

exploited

No known exploitation not in CISA KEV as of our last sync

fix

No fixed release stated by the publisher

likelihood

EPSS 0.37%top 69% of scored CVEs

Published 15 Sept 2026Analysed here 17 Sept 2026CVSS scored by the publisher (CNA)

common questions

Is CVE-2026-87288 being exploited?

Not confirmed. CVE-2026-87288 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.37% probability of exploitation in the next 30 days.

How severe is CVE-2026-87288?

CVE-2026-87288 is rated High with a CVSS score of 8.1. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.

Is there a patch for CVE-2026-87288?

Not known from our data. No patch reference has been recorded for CVE-2026-87288, which is not the same as no patch existing — a fix may have shipped without a tagged reference, or after this record was written. The vendor advisory is the only authority on whether a fix exists, and mitigations may be available regardless.

What does CVE-2026-87288 affect?

CVE-2026-87288 affects Oracle GraalVM 25.0.4.1, Oracle Java SE (GraalVM component). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.

What should I do about CVE-2026-87288?

Isolate and inventory GraalVM 25.0.4.1 instances; apply vendor patch when released; monitor logs

Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.

executive summary

technical analysis

affected

Oracle GraalVM 25.0.4.1Oracle Java SE (GraalVM component)

impact

Remote compromise/takeover of Oracle GraalVM via unauthenticated HTTP access (full C/I/A loss).

action required

Immediate action required

affected versions

Oracle Corporation Oracle GraalVM

affected25.0.4.1

As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.

cisa ssvc

exploitation: none
automatable: no
technical impact: total

Assessed by CISA 21 Sept 2026 (SSVC 2.0.3).

timeline

15 Sept 2026Published
17 Sept 2026Analysed by vulneraibility.com · 2 days later
21 Sept 2026CISA SSVC assessment: exploitation none · 3 days later
22 Sept 2026CVE record last updated · 1 day later

how to fix

Remediation steps are tailored for users whose stack is affected. Add this technology to your stack to see the fix checklist.

references

NVD CVE.org CVE Details Source

1 reference in the CVE record: 1 advisory

Advisoryoracle.com /security-alerts/oracle-open-source-cves-outside-other-oracle-public-documents.h

sources

CVE List (CVE.org): description, affected versions, references; CVE Terms of Use
NVD: CVSS and CPE data
CISA Vulnrichment (ADP): SSVC decision points
FIRST EPSS: exploit probability and percentile
Summary, impact and triage tags: written by our AI analysis pipeline from the sources above. Check them against the sources.

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