Incorrect Authorization Affecting io.vertx:vertx-web package, versions [4.0.0,4.5.35)[5.0.0,5.1.9)[5.2.0,5.2.1)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JAVA-IOVERTX-20954497
- published15 Oct 2026
- disclosed14 Oct 2026
- creditThomas Segismont
Introduced: 14 Oct 2026
NewCVE-2026-102460 (opens in a new tab)How to fix?
Upgrade io.vertx:vertx-web to version 4.5.35, 5.1.9, 5.2.1 or higher.
Overview
io.vertx:vertx-web is a HTTP web applications for Vert.x.
Affected versions of this package are vulnerable to Incorrect Authorization in the postAuthentication method of ChainAuthHandler, which depends on internal state set only during the authenticate phase, so when a preceding handler has already authenticated the user on the routing context and that phase is skipped, any() mode falls through without delegating the check to any handler and all() mode skips it outright. A user holding a valid token with insufficient scopes can reach resources guarded by scope requirements configured through withScope or withScopes by requesting them over a route where an earlier handler performed the authentication. This requires a chain containing a scope-requiring handler such as JWTAuthHandler or OAuth2AuthHandler, and the condition arises most readily with overlapping handlers on nested routes, where a parent route authenticates broadly and a child route chains to enforce specific scopes.