Connect your agent
AdvisoriesCriticalCheck your lockfilePluginHow it worksPricing Connect your agent

Advisory record · GHSA-2w7w-2j92-44hx

HTTP Request Smuggling in akka-http-core

CVSS 5.0 MediumEPSS 0.0071 · 53rd percentile

Published by the GitHub Advisory Database at 10 May 2021, 15:17 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
com.typesafe.akka:akka-http-coreMaven>=10.2.0, <10.2.4 || <10.1.1410.2.4, 10.1.14
Identifiers
GHSA-2w7w-2j92-44hx · CVE-2021-23339 · SNYK-JAVA-COMTYPESAFEAKKA-1075043
Weakness (CWE)
CWE-444
Tags
Published
10 May 2021
Updated
8 Jul 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Akka HTTP core (com.typesafe.akka:akka-http-core) versions 10.2.0 before 10.2.4 and before 10.1.14 are vulnerable to HTTP request smuggling. A server accepts a malformed message and passes it to the application, which may forward it unchanged to a second server that reads it as two messages, so the second request bypasses inspection by the proxy. Upgrade to version 10.2.4 or 10.1.14.

Written 2 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
5.0 Medium 3.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L CNA (snyk)
  • CISA KEV Not listed.
  • EPSS 0.0071, the 53rd percentile, on 7 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:19 UTC First seen by agentprime
  2. 31 Oct 2026, 14:19 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.