HTTP Request Smuggling Affecting org.http4s:http4s-server_3 package, versions [,0.23.35)[1.0.0-M1,1.0.0-M47)
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.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-JAVA-ORGHTTP4S-19869269
- published16 Sept 2026
- disclosed15 Sept 2026
- creditERobertGII
Introduced: 15 Sep 2026
NewCVE-2026-69205 (opens in a new tab)How to fix?
Upgrade org.http4s:http4s-server_3 to version 0.23.35, 1.0.0-M47 or higher.
Overview
Affected versions of this package are vulnerable to HTTP Request Smuggling in the HeaderP.parse process. An attacker can bypass access controls, hijack cross-user requests, or poison server caches by crafting HTTP requests with specially formatted Transfer-Encoding header values that exploit discrepancies in header parsing between the application and intermediaries.