CVE Watch3 nov 2026

CVE-2026-118489

In Eclipse Vert.x versions [4.0.0,4.5.35] or [5.0.0,5.2.2], when one `CachingWebClient` is shared across users — the documented pattern of a

CVSS

7.5

Alto

EPSS

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KEV

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Exploit Today

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0-100

Publicado: 3 nov 2026 · Última mod.: 3 nov 2026 · CWE-200 · CWE-524

EPSS · 30d

Sin historial EPSS suficiente todavía.

Descripción técnica

In Eclipse Vert.x versions [4.0.0,4.5.35] or [5.0.0,5.2.2], when one `CachingWebClient` is shared across users — the documented pattern of a per-user `WebClientSession` over a shared caching client — a response that is specific to one user but is cacheable and not marked `private`/`no-store` is stored in the client-level shared cache tier and served to other users requesting the same URL. A later user's session, or an anonymous caller through the same client, can receive an earlier user's response. Depending on the response this discloses authenticated content or a session cookie, the latter enabling session fixation or hijacking.

Referencias oficiales

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