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TI-2026-74635 Aliases CVE-2026-102467GHSA-q858-fr4g-2q5q

Unlimited decompression allocation in Eclipse Vert.x WebSocket

Priority MEDIUM 43CWE-770Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-770.

Summary

Eclipse Vert.x from 4.0.0 through 4.5.34, from 5.0.0 through 5.0.12, from 5.1.0 through 5.1.9, and version 5.2.0 are affected. The WebSocket implementation sets no maximum number of bytes it allocates when decompressing frames or messages (CWE-770). A remote, unauthenticated attacker can send a zip bomb over a WebSocket connection to exhaust server resources and cause denial of service.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00258 17th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Eclipse FoundationEclipse Vert.x4.0.0 – 4.5.34; 5.0.0 – 5.0.12; 5.1.0 – 5.1.9; 5.2.0—No fix listedCNA
  • Eclipse Vert.x VendorEclipse Foundation Affected 4.0.0 – 4.5.34; 5.0.0 – 5.0.12; 5.1.0 – 5.1.9; 5.2.0 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:eclipse:vert.x:*:*:*:*:*:*:*:*4.5.0 to before 4.5.35; 5.0.0 to before 5.1.10VulnerableEclipse Foundation
cpe:2.3:a:eclipse:vert.x:5.2.0:*:*:*:*:*:*:*5.2.0VulnerableEclipse Foundation
  • cpe:2.3:a:eclipse:vert.x:*:*:*:*:*:*:*:* Versions 4.5.0 to before 4.5.35; 5.0.0 to before 5.1.10 Vulnerable ·Eclipse Foundation
  • cpe:2.3:a:eclipse:vert.x:5.2.0:*:*:*:*:*:*:* Versions 5.2.0 Vulnerable ·Eclipse Foundation

Remediation

The sources list no fixed version for Eclipse Vert.x.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-15 Threatist record created from CVE-2026-102467
  2. 2026-10-16 Alias added: GHSA-q858-fr4g-2q5q
  3. 2026-10-21 CVSS score added · NVD
  4. 2026-11-06 Affected versions changed · Red Hat
  5. 2026-11-06 CVSS score added · Red Hat

References

Advisory 2

  • TI-2026-06017 Improper certificate validation in Eclipse Vert.x CVSS 4.0MEDIUM 6.9
  • TI-2025-10971 In Eclipse Vert.x versions [4.0.0, 4.5.21] and [5.0.0, 5.0.4], a StaticHandler… CVSS 4.0MEDIUM 6.3
  • TI-2019-13165 Path traversal in Eclipse Vert.x CVSS 3.1CRITICAL 9.8
  • TI-2018-09003 XML external entity injection in Eclipse Vert.x CVSS 3.0CRITICAL 9.8
  • TI-2018-09001 Path traversal in Eclipse Vert.x CVSS 3.0CRITICAL 9.8
  • TI-2025-10972 Cross-site scripting in Eclipse Foundation Vert.x CVSS 4.0LOW 2.3
See all 26 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences