CVE-2026-21947

Vulnerability in Oracle Java SE (component: JavaFX). Supported versions that are affected are Oracle Java SE: 8u471-b50. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Oracle Java SE. Successful attacks require human interaction from a person other than the attacker. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Oracle Java SE accessible data. Note: This vulnerability 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. This vulnerability does not apply to Java deployments, typically in servers, that load and run only trusted code (e.g., code installed by an administrator). CVSS 3.1 Base Score 3.1 (Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N).

Published: 2026-01-20 Last update: 2026-05-12 Assigner: [email protected] Source: [email protected]

Conclusion & alert: CVE-2026-21947 is rated Low Risk (19.5/100): CVSS Low severity, with low exploitation likelihood (EPSS 0.07%). Mandatory action: Low composite risk—no urgent action required; patch on your normal maintenance cycle and revisit priority if CVSS or EPSS increases.

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-2026-21947

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 2026-05-22 0.03% 0.07% +0.04%
2 2026-01-21 0.03%

Full EPSS history (2 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-21947

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
3.1 3.1 LOW
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/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:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
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:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
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.
1.6 1.4 [email protected]

Weakness enumeration for CVE-2026-21947

GitHub Security Advisory for CVE-2026-21947

GHSA-998g-2mp2-f264 · Severity: low — Vulnerability in Oracle Java SE (component: JavaFX). Supported versions that are affected are...

OS Trackers for CVE-2026-21947

vendor priority summary link
debian unimportant CVE-2026-21947 unimportant priority: Debian including 1 source packages (openjfx), 4 status rows across 4 suites (bookworm, bullseye, sid, trixie): resolved 4. https://security-tracker.debian.org/tracker/CVE-2026-21947
suse low CVE-2026-21947 severity low: SUSE including 41 source package names (java-11-openjdk, java-11-openjdk-demo, …), 265 product×package rows across 23 product lines (SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS, SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS, … (23 product lines)): Known Not Affected 263, Fixed 2. https://www.suse.com/security/cve/CVE-2026-21947/
ubuntu medium CVE-2026-21947 medium priority: Ubuntu including 1 source packages (openjfx), 7 status rows across 7 suites (bionic, focal, jammy, noble, questing, upstream, xenial): needs-triage 6, not-affected 1. https://ubuntu.com/security/CVE-2026-21947

Affected software / configurations for CVE-2026-21947

Vendor Product Version Raw CPE
oracle jdk 1.8.0 cpe:2.3:a:oracle:jdk:1.8.0:update471_b50:*:*:-:*:*:*
oracle jre 1.8.0 cpe:2.3:a:oracle:jre:1.8.0:update471_b50:*:*:-:*:*:*

References for CVE-2026-21947

cvelogic Threat Intelligence