No exploitation reportedFix available

CVE-2026-34282

Q: Is CVE-2026-34282 actively exploited?

Active exploitation of CVE-2026-34282 has not been confirmed. Its EPSS score was 0.6% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2026-34282?

CVE-2026-34282 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

No exploitation reported by the sources we read.

Published2026-04-21
Fixed in26.0.1 · 25.0.3 · 21.0.11 · 17.0.19 · 11.0.31 · 8.0.491
WeaknessCWE-400 · CWE-835

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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: 8u481-perf, 11.0.30, 17.0.18, 21.0.10, 25.0.2, 26; Oracle GraalVM for JDK: 17.0.18 and 21.0.10; Oracle GraalVM Enterprise Edition: 21.3.17. 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 of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition. 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 7.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

Timeline

dates in UTC

2026-04-2121:16CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-34282?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-34282?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

OSV

java

Branch	Affected	Fixed in	Source
26.0	≥ 26.0.0, < 26.0.1	26.0.1	OSV
25.0	≥ 22.0.0, < 25.0.3	25.0.3	OSV
21.0	≥ 18.0.0, < 21.0.11	21.0.11	OSV
17.0	≥ 12.0.0, < 17.0.19	17.0.19	OSV
11.0	≥ 9.0.0, < 11.0.31	11.0.31	OSV
8.0	≥ 1.9.0, < 8.0.491	8.0.491	OSV
1.8	< 1.8.0	1.8.0	OSV

java-min

Branch	Affected	Fixed in	Source
26.0	≥ 26.0.0, < 26.0.1	26.0.1	OSV
25.0	≥ 22.0.0, < 25.0.3	25.0.3	OSV
21.0	≥ 18.0.0, < 21.0.11	21.0.11	OSV
17.0	≥ 12.0.0, < 17.0.19	17.0.19	OSV
11.0	≥ 9.0.0, < 11.0.31	11.0.31	OSV
8.0	≥ 1.9.0, < 8.0.491	8.0.491	OSV
1.8	< 1.8.0	1.8.0	OSV

jre

Branch	Affected	Fixed in	Source
26.0	≥ 26.0.0, < 26.0.1	26.0.1	OSV
25.0	≥ 22.0.0, < 25.0.3	25.0.3	OSV
21.0	≥ 18.0.0, < 21.0.11	21.0.11	OSV
17.0	≥ 12.0.0, < 17.0.19	17.0.19	OSV
11.0	≥ 9.0.0, < 11.0.31	11.0.31	OSV
8.0	≥ 1.9.0, < 8.0.491	8.0.491	OSV
1.8	< 1.8.0	1.8.0	OSV

4 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

java-17-openjdkAlmaLinux:9all versions · fixed in 1:17.0.19.0.10-2.el9.alma.1and 22 other packages
java-17-openjdkAlmaLinux:8all versions · fixed in 1:17.0.19.0.10-1.el8and 22 other packages
java-21-openjdkAlmaLinux:10all versions · fixed in 1:21.0.11.0.10-2.el10_2.alma.1and 22 other packages
java-21-openjdkAlmaLinux:9all versions · fixed in 1:21.0.11.0.10-2.el9.alma.1and 22 other packages
java-21-openjdkAlmaLinux:8all versions · fixed in 1:21.0.11.0.10-1.el8and 22 other packages
java-25-openjdkAlmaLinux:10all versions · fixed in 1:25.0.3.0.9-1.el10_2and 25 other packages
java-25-openjdkAlmaLinux:9all versions · fixed in 1:25.0.3.0.9-1.el9.alma.1and 25 other packages

Full record on NVD

Fix

Update java to 26.0.1 · 25.0.3 · 21.0.11 · 17.0.19 · 11.0.31 · 8.0.491 · 1.8.0

Advisories and patches

www.oracle.comVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVE recordread 2026-10-23
CISA-ADPSSVC decisionnone2026-04-22
OpenCVESSVC decisionnone—
CNACVSS 3.17.5read 2026-10-23
CISA-ADPweakness (CWE)CWE-4002026-04-22
CNAweakness (CWE)CWE-835read 2026-10-23
FIRST EPSSEPSS score0.6 %2026-10-23
OSVaffected packages—

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: 2026-04-21
Last Modified: 2026-09-18
NVD status: Modified

Frequently asked questions

What is CVE-2026-34282?

Is CVE-2026-34282 actively exploited?

Active exploitation of CVE-2026-34282 has not been confirmed. Its EPSS score was 0.6% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-34282?

CVE-2026-34282 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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