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CVE-2026-102467GHSA-h722-h6c2-6j3c

In Eclipse Vert.x versions [4.0.0, 4.5.34] or [5.0.0,5.0.12] or [5.1.0,5.1.9] or [5.2.0, 5.2.0], the WebSocket implementation does not define a maximum number of bytes allocation when decompressing fr

Eclipse Foundation Eclipse Vert.x
Open in ThreatlineRecord JSON
CVSS
8.7High
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.26%Chance of exploitation activity in the next 30 days, higher than 16% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
Published15 Oct 2026Updated 15 Oct 2026CVE List

What fixes it

No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.

Description

In Eclipse Vert.x versions [4.0.0, 4.5.34] or [5.0.0,5.0.12] or [5.1.0,5.1.9] or [5.2.0, 5.2.0], the WebSocket implementation does not define a maximum number of bytes allocation when decompressing frames or messages. This can be used to implement DDOS attacks with a zip bomb.

The impacted component is io.vertx:vertx-core.

Text from CVE List

Affected versions 4

  • Eclipse Vert.xaffected: 4.0.0 through 4.5.34CVE List
  • Eclipse Vert.xaffected: 5.0.0 through 5.0.12CVE List
  • Eclipse Vert.xaffected: 5.1.0 through 5.1.9CVE List
  • Eclipse Vert.xaffected: 5.2.0CVE List

References 2