4.8

CVE-2026-91487: oracle corporation oracle java se Improper Access Control

Awaiting analysis
AliasesDEBIAN-CVE-2026-91487UBUNTU-CVE-2026-91487ALPINE-CVE-2026-91487
Published 20-10-2026Last modified 24-10-2026

Vulnerability summary

CVE-2026-91487 is a medium (CVSS 4.8) Improper Access Control vulnerability in oracle corporation oracle java se. EPSS estimates a 0.17% chance of exploitation in the next 30 days, higher than 6.1% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 4.8, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
4.8/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.17%
0%100%
Low · Change unavailable
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 4 · Related 3
MGASA-2026-0572OPENSUSE-SU-2026:12294-1OPENSUSE-SU-2026:12328-1OPENSUSE-SU-2026:12329-1

Timeline

  1. 20-10-2026
    PublishedVulnerability first disclosed.
  2. 24-10-2026
    Last modifiedVulnerability information updated.

Description

Vulnerability in Oracle Java SE (component: Compiler). Supported versions that are affected are Oracle Java SE: 8u503-perf, 11.0.32.1, 17.0.20.1, 21.0.12.1, 25.0.4.1, 27; Oracle GraalVM for JDK: 17.0.20.1 and 21.0.12.1; Oracle GraalVM Enterprise Edition: 21.3.19.1.1. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Oracle Java SE. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Oracle Java SE accessible data as well as unauthorized read access to a subset of Oracle Java SE accessible data. Note: This vulnerability can only be exploited by supplying data to APIs in the specified Component without using Untrusted Java Web Start applications or Untrusted Java applets, such as through a web service. CVSS 3.1 Base Score 4.8 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N).

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.17%

Chance of exploitation in the next 30 days

Percentile

6%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

21-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu12 products
  • openjdk-13All versions (No fix recorded)
  • openjdk-16All versions (No fix recorded)
  • openjdk-17All versions (No fix recorded)
  • openjdk-17-cracAll versions (No fix recorded)
  • openjdk-18All versions (No fix recorded)
Debian4 products
  • openjdk-17All versions (No fix recorded) | < 17.0.21+9-1~deb12u1
  • openjdk-21All versions (No fix recorded) | < 21.0.13+9-1~deb13u2 | < 21.0.13+9-1
  • openjdk-25All versions (No fix recorded) | < 25.0.5+8-1~deb13u1 | < 25.0.5+8-1
  • openjdk-27All versions (No fix recorded)
Alpine2 products
  • openjdk21< 21.0.13.0.3_p1-r0
  • openjdk25< 25.0.5.0.3_p1-r0
Oracle corporation1 product
  • oracle java se8u503-perf | 11.0.32.1 | 17.0.20.1 | 21.0.12.1 | 25.0.4.1 | 27

4 vendors · 19 products

References

6 links