Oracle GraalVM is an enterprise Java runtime; unauthenticated remote takeover risk across many organizations warrants broad notice.
CVE-2026-87288
Unauthenticated HTTP flaw allows remote takeover of Oracle GraalVM
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 0.22% 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.
Remote compromise/takeover of Oracle GraalVM via unauthenticated HTTP access (full C/I/A loss).
Immediate action required
- 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.