CVE-2021-43797

medium
Published 2021-12-09 · Modified 2026-03-13
CVSS v3
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
CVSS v2
VIR risk
5.5

Description

HTTP request smuggling in netty

Predictions

Exploit likelihood
30%
Patch ETA

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2021-43797

vendor Authored 2026-05-27

Vendor advisory: rocky — https://errata.rockylinux.org/RLSA-2022:5498

vendor Authored 2026-05-27

Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2021-43797.html

OS impact

OSVersionStatusFixed in
suse slesaffected
rockylinux rocky8fixed
debian debianbookwormfixed1:4.1.48-6
debian debianbullseyefixed1:4.1.48-4+deb11u1
debian debianforkyfixed1:4.1.48-6
debian debiansidfixed1:4.1.48-6
debian debiantrixiefixed1:4.1.48-6

Package impact

EcosystemPackageVulnerableFixed
java Mavenio.netty:netty-codec-http>=4.0.0,<4.1.71.Final4.1.71.Final
java Mavenorg.jboss.netty:netty
java Mavenio.netty:netty

References

Verify integrity in audit chain (admin only). AS-IS.