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CVE-2026-102479

8.7 high SSVC exploitation: none Modified
NVD · CVE.org

In Eclipse Vert.x versions [5.0.0,5.0.12] or [5.1.0,5.1.9] or [5.2.0, 5.2.0], the Vert.x HTTP/1.x decoder uses a canonicalization for well known HTTP headers, the canonicalization process interprets well crafted headers as headers of this list, allowing for instance Content-Xength to be interpeted as Content-Length. This can be exploited for request smuggling purpose. The impacted component is io.vertx:vertx-core.

Fix

Patch, vendor advisory and mitigation references on NVD 1

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 8

  1. References+1 references (now 3)NVD modified 2026-10-28 21:16
  2. StatusAnalyzed → ModifiedNVD modified 2026-10-28 21:16
  3. Cpes+2 CPE criteria (now 2)NVD modified 2026-10-20 19:31
  4. StatusUndergoing Analysis → AnalyzedNVD modified 2026-10-20 19:31
  5. CwesCWE-444NVD modified 2026-10-16 19:17
  6. StatusAwaiting Analysis → Undergoing AnalysisNVD modified 2026-10-16 19:17
  7. StatusReceived → Awaiting AnalysisNVD modified 2026-10-15 14:41
  8. First seenCVSS 8.7NVD modified 2026-10-14 19:17

Affected (CPE criteria) 2

  • cpe:2.3:a:eclipse:vert.x:*:*:*:*:*:*:*:*
  • cpe:2.3:a:eclipse:vert.x:5.2.0:*:*:*:*:*:*:*

References 3