CVE-2026-91403: Oracle Java SE 8u511, 8u511-perf, 11.0.33, 17.0.21, 21.0.13, 25.0.5, 27.0.1; +2 more affected products

CVE-2026-91403. CVSS 3.1 base score 9.1 (GitHub Advisory Database).

Affected technology

Oracle Java SE · 8u511, 8u511-perf, 11.0.33, 17.0.21, 21.0.13, 25.0.5, 27.0.1
Oracle Corporation

Oracle GraalVM for JDK · 17.0.21, 21.0.13
Oracle Corporation

Oracle GraalVM Enterprise Edition · 21.3.20
Oracle Corporation

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 3.1): Network (remote) · No privileges required · No user interaction required

What an attacker can do

Unauthenticated attacker with network access via multiple protocols can compromise Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition. Vendor/CNA’s CVSS 3.1 assessment (base score 9.1/10) rates confidentiality and integrity impact as high; availability impact as none.

Published 22-Oct-2026 01:10 UTC

CCR priority: 36.4 /100 (P4)
CVSS 3.1: 9.1 /10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N · GitHub Advisory Database
KEV: no

Provenance

GitHub Advisory Database · Source record · observed 2026-10-22 02:21:33.599910+00:00 UTC
NVD CVE API 2.0 · Source record · observed 2026-10-22 01:08:24.561609+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2026-91403.html