CVE-2019-20444
CRITICAL 9.1EPSS 8.9%
HttpObjectDecoder.java in Netty before 4.1.44 allows an HTTP header that lacks a colon, which might be interpreted as a separate header with an incorrect syntax, or might be interpreted as an "invalid fold."
- CVSS v3.1 NVD
- 9.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N - CVSS v2.0 NVD
- 6.4 MEDIUM
AV:N/AC:L/Au:N/C:P/I:P/A:N - EPSS
- 8.91% chance of exploitation in the next 30 days, 95th percentile
- Published
- 2020-01-29
- Updated
- 2026-10-08
Proof-of-concept exploits (1)
Security advisories
- https://access.redhat.com/errata/RHSA-2020:0497
- https://access.redhat.com/errata/RHSA-2020:0567
- https://access.redhat.com/errata/RHSA-2020:0601
- https://access.redhat.com/errata/RHSA-2020:0605
- https://access.redhat.com/errata/RHSA-2020:0606
- https://access.redhat.com/errata/RHSA-2020:0804
- https://access.redhat.com/errata/RHSA-2020:0805
- https://access.redhat.com/errata/RHSA-2020:0806
- https://access.redhat.com/errata/RHSA-2020:0811
- netty/netty/issues/9866
- https://lists.debian.org/debian-lts-announce/2020/02/msg00017.html
- https://lists.debian.org/debian-lts-announce/2020/02/msg00018.html
- https://lists.debian.org/debian-lts-announce/2020/09/msg00003.html
- https://lists.debian.org/debian-lts-announce/2020/09/msg00004.html
- https://usn.ubuntu.com/4532-1
- https://www.debian.org/security/2021/dsa-4885
- advisories/GHSA-cqqj-4p63-rrmm