CVE Tools
Sign in

CVE-2021-43797

HTTP fails to validate against control chars in header names which may lead to HTTP request smuggling

Published: Dec 9, 2021Updated: Nov 21, 2024 Sources: CVE List NVD GHSA BDUCWE-444
NVD MITRE
6.5CVSSMEDIUM
EPSS Score
2.7%
Top 16.1%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

HTTP request smuggling in netty

CVSS Vector Breakdown

AV:NAC:LPR:NUI:RS:UC:NI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:HIntegrity
High
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

CWE-444

Affected Products

io.netty:netty-codec-httpMavenOSS Libraries
org.jboss.netty:nettyMavenOSS Libraries
io.netty:nettyMavenOSS Libraries
nettynetty
LibraryLibrary
OSS Libraries / generic-library
quarkusquarkus
Library
OSS Libraries / web-framework
mavenpackage-ecosystemOSS Libraries
nettyoss-projectOSS Librariesaka io.netty:netty, netty-incubator-codec-ohttp
quarkusoss-projectOSS Librariesaka quarkus.io
and 70 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Collection
View detailed technique mapping

References

https://github.com/netty/netty/security/advisories/GHSA-wx5j-54mm-rqqq
github.com
https://nvd.nist.gov/vuln/detail/CVE-2021-43797
nvd.nist.gov
https://github.com/netty/netty/pull/11891
github.com
and 17 more references View all →

Timeline

Published
Dec 9, 2021
Last Updated
Nov 21, 2024

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2021-43797 and every CVE in our database. Create a free account — no credit card required.

Create Free Account
Plain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows