HTTP Request Smuggling Affecting io.vertx:vertx-core package, versions [,4.5.24)
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-14988768
- published16 Jan 2026
- disclosed15 Jan 2026
- creditUnknown
Introduced: 15 Jan 2026
CVE-2026-1002 (opens in a new tab)How to fix?
Upgrade io.vertx:vertx-core to version 4.5.24 or higher.
Overview
io.vertx:vertx-core is a tool-kit for building reactive applications on the JVM.
Affected versions of this package are vulnerable to HTTP Request Smuggling due to improper handling of / in the output buffer by removeDots() function in Static Handler. An attacker can prevent access to static files by sending specifically crafted request URIs that exploit improper handling of encoded path traversal sequences.
Workaround
This vulnerability can be mitigated by disabling the Static Handler cache.