CVE-2021-23339: lightbend akka-http HTTP Request/Response Smuggling
CVSS: 6.5v3.1MediumModified
AliasesGHSA-2w7w-2j92-44hxSNYK-JAVA-COMTYPESAFEAKKA-1075043
Published 17-02-2021Last modified 16-09-2024
Vulnerability summary
CVE-2021-23339 is a medium (CVSS 6.5) HTTP Request/Response Smuggling vulnerability in lightbend akka-http. EPSS estimates a 0.71% chance of exploitation in the next 30 days, higher than 52.7% of scored vulnerabilities.
CVSS score
6.5/10
010
Medium · v3.1 (NVD)EPSS score
0.71%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 17-02-2021PublishedVulnerability first disclosed.
- 16-09-2024Last modifiedVulnerability information updated.
Description
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.
CVSS metrics
4 scores · 3 sources · 2 versionsMedium 6.5Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:NSources3 sources · 5.0–6.5
- CVE.orgCNA5.0MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:LDiffers
- OSV · MavenEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Medium 6.4Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:P/I:P/A:NSourcesSingle source
EPSS trend
Probability
0.71%
Chance of exploitation in the next 30 days
Percentile
53%
Versus all other CVEs
30-day change
0.00 pp
From 0.71% on 20-09-2026
20-09-202620-10-2026
EPSS score0.71%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Com.typesafe.akka1 product
- akka-http-core≥ 10.2.0, < 10.2.4 | < 10.1.14
Lightbend1 product
- akka-http< 10.1.14 | ≥ 10.2.0, < 10.2.4
2 vendors · 2 products
