Cyber Resilience

CVE-2021-23339

Medium

Published: 17 February 2021

Published
17 February 2021
Modified
21 November 2024
KEV Added
—
Patch
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CVSS Score v3.1 5.0 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L
EPSS Score 0.0021 43.7th percentile
Risk Priority 10 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2021-23339 is a medium-severity HTTP Request/Response Smuggling (CWE-444) vulnerability in Lightbend Akka-Http. Its CVSS base score is 5.0 (Medium).

Operationally, ranked at the 43.7th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

This affects all versions before 10.1.14 and from 10.2.0 to 10.2.4 of package com.typesafe.akka:akka-http-core. It allows multiple Transfer-Encoding headers.

CWE(s)
CWE-444

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

lightbend
akka-http
≤ 10.1.14 · 10.2.0 — 10.2.4

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References