CVE-2026-21933

Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: Networking). 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 require human interaction from a person other than the attacker and while the vulnerability is in Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition accessible data as well as unauthorized read access to a subset of Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition accessible data. Note: This vulnerability can be exploited by using APIs in the specified Component, e.g., through a web service which supplies data to the APIs. This vulnerability also 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. CVSS 3.1 Base Score 6.1 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N).

Published: 2026-01-20 Last update: 2026-05-12 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2026-21933 is rated Low Risk (26.9/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.03%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2026-21933

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-01-21 — 0.03% —

Full EPSS history (1 record total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-21933

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.1 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
 2.8 2.7 [email protected]

Weakness enumeration for CVE-2026-21933

GitHub Security Advisory for CVE-2026-21933

GHSA-5rm3-299f-6m9v · Severity: medium — Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition...

OS Trackers for CVE-2026-21933

vendor priority summary link
alpine — CVE-2026-21933: 3 source package rows (openjdk11, openjdk17, openjdk21); 6 state rows across 2 repos (3.23-community, edge-community); fixed 6, open 0. https://security.alpinelinux.org/vuln/CVE-2026-21933
debian not yet assigned CVE-2026-21933 not yet assigned priority: Debian including 5 source packages (openjdk-11, openjdk-17, openjdk-21, openjdk-25, openjdk-8), 12 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 12. https://security-tracker.debian.org/tracker/CVE-2026-21933
redhat medium — https://access.redhat.com/security/cve/CVE-2026-21933
suse medium — https://www.suse.com/security/cve/CVE-2026-21933/
ubuntu medium CVE-2026-21933 medium priority: Ubuntu including 12 source packages (openjdk-13, openjdk-16, …), 59 status rows across 7 suites (bionic, focal, jammy, noble, questing, upstream, xenial): released 34, DNE 17, ignored 4, needs-triage 4. https://ubuntu.com/security/CVE-2026-21933

Affected software / configurations for CVE-2026-21933

Vendor Product Version Raw CPE
oracle graalvm 21.3.16 cpe:2.3:a:oracle:graalvm:21.3.16:*:*:*:enterprise:*:*:*
oracle graalvm_for_jdk 17.0.17 cpe:2.3:a:oracle:graalvm_for_jdk:17.0.17:*:*:*:*:*:*:*
oracle graalvm_for_jdk 21.0.9 cpe:2.3:a:oracle:graalvm_for_jdk:21.0.9:*:*:*:*:*:*:*
oracle jdk 1.8.0 cpe:2.3:a:oracle:jdk:1.8.0:update471:*:*:-:*:*:*
oracle jdk 1.8.0 cpe:2.3:a:oracle:jdk:1.8.0:update471:*:*:enterprise_performance_pack:*:*:*
oracle jdk 1.8.0 cpe:2.3:a:oracle:jdk:1.8.0:update471_b50:*:*:-:*:*:*
oracle jdk 11.0.29 cpe:2.3:a:oracle:jdk:11.0.29:*:*:*:*:*:*:*
oracle jdk 17.0.17 cpe:2.3:a:oracle:jdk:17.0.17:*:*:*:*:*:*:*
oracle jdk 21.0.9 cpe:2.3:a:oracle:jdk:21.0.9:*:*:*:*:*:*:*
oracle jdk 25.0.1 cpe:2.3:a:oracle:jdk:25.0.1:*:*:*:*:*:*:*
oracle jre 1.8.0 cpe:2.3:a:oracle:jre:1.8.0:update471:*:*:-:*:*:*
oracle jre 1.8.0 cpe:2.3:a:oracle:jre:1.8.0:update471:*:*:enterprise_performance_pack:*:*:*
oracle jre 1.8.0 cpe:2.3:a:oracle:jre:1.8.0:update471_b50:*:*:-:*:*:*
oracle jre 11.0.29 cpe:2.3:a:oracle:jre:11.0.29:*:*:*:*:*:*:*
oracle jre 17.0.17 cpe:2.3:a:oracle:jre:17.0.17:*:*:*:*:*:*:*
oracle jre 21.0.9 cpe:2.3:a:oracle:jre:21.0.9:*:*:*:*:*:*:*
oracle jre 25.0.1 cpe:2.3:a:oracle:jre:25.0.1:*:*:*:*:*:*:*

References for CVE-2026-21933

cvelogic Threat Intelligence