Attestkeep
Language: English
Sign up

Vulnerabilities / CVE-2023-54397

critical

CVE-2023-54397

python-tornado: Tornado before 6.3.3 HTTP Request Smuggling via Content-Length

Published Modified CWE 444
In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.

Severity by source

Red Hat7.5CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:N

Trivy's own label is CRITICAL. Rated critical by Red Hat. Rated lower by Ubuntu (medium).

Description

Tornado before 6.3.3 contains an HTTP request smuggling vulnerability due to improper parsing of Content-Length headers accepting non-standard characters. Attackers can send crafted HTTP requests with these characters to bypass proxy validation and smuggle requests when deployed behind certain proxies.

Affected packages and fixed versions

SourcePackageFixed in
Red Hatpython-tornado, python-tornado-docno fix listed
debian 11python-tornadono fix listed
debian 12python-tornadono fix listed
debian 13python-tornado6.4.0-1
debian 14python-tornado6.4.0-1
echopython-tornado6.4.0-1
rapidfort amazon linux 2023python-tornadono fix listed
rapidfort debian 12python-tornado0:6.4.0-1
rapidfort debian 13python-tornado0:6.4.0-1
ubuntu 18.04-ESMpython-tornado4.5.3-1ubuntu0.2+esm4
ubuntu 20.04-ESMpython-tornado6.0.3+really5.1.1-3ubuntu0.1~esm6
ubuntu 22.04python-tornadono fix listed
Show all 13 entries from 12 sources
SourcePackageFixed in
Red Hatpython-tornadono fix listed
Red Hatpython-tornado-docno fix listed
debian 11python-tornadono fix listed
debian 12python-tornadono fix listed
debian 13python-tornado6.4.0-1
debian 14python-tornado6.4.0-1
echopython-tornado6.4.0-1
rapidfort amazon linux 2023python-tornadono fix listed
rapidfort debian 12python-tornado0:6.4.0-1
rapidfort debian 13python-tornado0:6.4.0-1
ubuntu 18.04-ESMpython-tornado4.5.3-1ubuntu0.2+esm4
ubuntu 20.04-ESMpython-tornado6.0.3+really5.1.1-3ubuntu0.1~esm6
ubuntu 22.04python-tornadono fix listed

References

Vulnerability data compiled from the Trivy vulnerability database (trivy-db, Aqua Security, Apache License 2.0), which aggregates third-party advisories. CVE records are published by The MITRE Corporation under the CVE Terms of Use; CVE is a trademark of MITRE. This product uses data from the NVD API but is not endorsed or certified by the NVD. Severity, titles and advisory data from the GitHub Advisory Database (CC BY 4.0), Red Hat security data (CC BY 4.0) and the other sources linked on each entry. Entries may be summarised or re-formatted; the linked original is the authoritative record.