CVE-2019-20444
criticalHttpObjectDecoder.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 synta…
Vendor / product: Netty — netty
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
9.1
9.1 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N Severity source: NVD CVSS v3.1 (nvd@nist.gov)
Timeline (UTC)
Published: 2020-01-29 21:15
Modified: 2026-10-08 22:16
NVD status: Modified
Last synced 2 days ago
Verified against the source API 2026-10-27 07:06 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
netty / netty <4.1.44
debian / debian_linux 8.0, 9.0, 10.0
fedoraproject / fedora 33
canonical / ubuntu_linux 18.04
redhat / jboss_amq_clients 2
redhat / jboss_enterprise_application_platform 7.2, 7.3
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
Patch / mitigation: https://github.com/netty/netty/compare/netty-4.1.43.Final...netty-4.1.44.Final
Patch / mitigation: https://github.com/netty/netty/issues/9866
Patch / mitigation: https://github.com/netty/netty/compare/netty-4.1.43.Final...netty-4.1.44.Final
Patch / mitigation: https://github.com/netty/netty/issues/9866
References
- https://access.redhat.com/errata/RHSA-2020:0497 cve@mitre.org
- https://access.redhat.com/errata/RHSA-2020:0567 cve@mitre.org
- https://access.redhat.com/errata/RHSA-2020:0601 cve@mitre.org
- https://access.redhat.com/errata/RHSA-2020:0605 cve@mitre.org
- https://access.redhat.com/errata/RHSA-2020:0606 cve@mitre.org
- https://access.redhat.com/errata/RHSA-2020:0804 cve@mitre.org
- https://access.redhat.com/errata/RHSA-2020:0805 cve@mitre.org
- https://access.redhat.com/errata/RHSA-2020:0806 cve@mitre.org
- https://access.redhat.com/errata/RHSA-2020:0811 cve@mitre.org
- https://github.com/netty/netty/compare/netty-4.1.43.Final...netty-4.1.44.Final cve@mitre.org
- https://github.com/netty/netty/issues/9866 cve@mitre.org
- https://github.com/poc-effectiveness/PoCAdaptation/tree/main/Adapted/CVE-2019-20444/5.0.0.... cve@mitre.org
- https://lists.apache.org/thread.html/r059b042bca47be53ff8a51fd04d95eb01bb683f1afa209db136e... cve@mitre.org
- https://lists.apache.org/thread.html/r0aa8b28e76ec01c697b15e161e6797e88fc8d406ed762e253401... cve@mitre.org
- https://lists.apache.org/thread.html/r0c3d49bfdbc62fd3915676433cc5899c5506d06da1c552ef1b79... cve@mitre.org
- https://lists.apache.org/thread.html/r0f5e72d5f69b4720dfe64fcbc2da9afae949ed1e9cbffa84bb7d... cve@mitre.org
- https://lists.apache.org/thread.html/r1b103833cb5bc8466e24ff0ecc5e75b45a705334ab6a444e64e8... cve@mitre.org
- https://lists.apache.org/thread.html/r1fcccf8bdb3531c28bc9aa605a6a1bea7e68cef6fc12e01faafb... cve@mitre.org
- https://lists.apache.org/thread.html/r205937c85817a911b0c72655c2377e7a2c9322d6ef6ce1b118d3... cve@mitre.org
- https://lists.apache.org/thread.html/r2f2989b7815d809ff3fda8ce330f553e5f133505afd04ffbc135... cve@mitre.org
- https://lists.apache.org/thread.html/r310d2ce22304d5298ff87f10134f918c87919b452734f9841d95... cve@mitre.org
- https://lists.apache.org/thread.html/r34912a9b1a5c269a77b8be94ef6fb6d1e9b3c69129719dc00f01... cve@mitre.org
- https://lists.apache.org/thread.html/r36fcf538b28f2029e8b4f6b9a772f3b107913a78f09b095c5b15... cve@mitre.org
- https://lists.apache.org/thread.html/r489886fe72a98768eed665474cba13bad8d6fe0654f249877066... cve@mitre.org
- https://lists.apache.org/thread.html/r4c675b2d0cc2a5e506b11ee10d60a378859ee340aca052e4c7ef... cve@mitre.org
Data sources
NVD CVE API 2.0 — fetched 2026-10-27 07:06 UTC · record ↗