CVE catalog
CVE-2024-52804
Tornado vulnerabilities
- Severity
- High · CVSS 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 1.04% · Oct 25, 2026
Tornado is a Python web framework and asynchronous networking library. The algorithm used for parsing HTTP cookies in Tornado versions prior to 6.4.2 sometimes has quadratic complexity, leading to excessive CPU consumption when parsing maliciously-crafted cookie headers. This parsing occurs in the event loop thread and may block the processing of other requests. Version 6.4.2 fixes the issue.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | python-tornado | sid | 6.5.5-5 | fixed |
| Debian | python-tornado | forky | 6.5.5-5 | fixed |
| Debian | python-tornado | trixie | 6.4.2-3+deb13u2 | fixed |
| Debian | python-tornado | trixie-security | 6.4.2-3+deb13u2 | fixed |
| Debian | python-tornado | bookworm | 6.2.0-3+deb12u4 | fixed |
| Debian | python-tornado | bookworm-security | 6.2.0-3+deb12u4 | fixed |
| Ubuntu | python-tornado | noble | 6.4.0-1ubuntu0.1 | fixed |
| Ubuntu | python-tornado-doc | noble | 6.4.0-1ubuntu0.1 | fixed |
| Ubuntu | python3-tornado | noble | 6.4.0-1ubuntu0.1 | fixed |
| Suse | python-tornado6 | linux micro 6.0 | 6.4-2.1 | fixed |
| Suse | python-tornado6 | linux micro 6.1 | 6.4-slfo.1.1_2.1 | fixed |
| Suse | python-tornado6 | linux enterprise module for python 3 15 sp5 | 6.3.2-150400.9.6.1 | fixed |
| Suse | python-tornado6 | linux enterprise module for python 3 15 sp6 | 6.3.2-150400.9.6.1 | fixed |
| Opensuse | python-tornado6 | leap 15.5 | 6.3.2-150400.9.6.1 | fixed |
| Opensuse | python-tornado6 | leap 15.6 | 6.3.2-150400.9.6.1 | fixed |
| Opensuse | python-tornado6 | tumbleweed | 6.4.2-1.1 | fixed |
| Ubuntu | python-tornado | pro | 6.1.0-1build1 | vulnerable |
| Ubuntu | python-tornado | pro | 6.1.0-2 | vulnerable |
| Ubuntu | python-tornado | pro | 6.1.0-3 | vulnerable |
| Ubuntu | python-tornado | pro | 6.1.0-3build1 | vulnerable |
| Ubuntu | python-tornado | pro | 6.1.0-3ubuntu0.1~esm1 | fixed |
| Ubuntu | python-tornado | 24.04 | 6.3.2-1 | vulnerable |
| Ubuntu | python-tornado | 24.04 | 6.4.0-0ubuntu1 | vulnerable |
| Ubuntu | python-tornado | 24.04 | 6.4.0-1 | vulnerable |
| Ubuntu | python-tornado | 24.04 | 6.4.0-1build1 | vulnerable |
| Ubuntu | python-tornado | 24.04 | 6.4.0-1ubuntu0.1 | fixed |
| Ubuntu | python-tornado | 25.10 | 6.4.2-1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | python-tornado | source | sid | 6.4.2-1 | not yet assigned | Not reported | [1088112] |
| Debian | python-tornado | source | forky | 6.4.2-1 | not yet assigned | Not reported | [1088112] |
| Debian | python-tornado | source | trixie | 6.4.2-1 | not yet assigned | Not reported | [1088112] |
| Debian | python-tornado | source | bookworm | 6.2.0-3+deb12u1 | not yet assigned | Not reported | [1088112] |
| Ubuntu | python-tornado | deb | noble | 6.4.0-1ubuntu0.1 | Not reported | Not reported | Not reported |
| Ubuntu | python-tornado-doc | deb | noble | 6.4.0-1ubuntu0.1 | Not reported | Not reported | Not reported |
| Ubuntu | python3-tornado | deb | noble | 6.4.0-1ubuntu0.1 | Not reported | Not reported | Not reported |
| Suse | python-tornado6 | rpm | linux micro 6.0 | 6.4-2.1 | Not reported | SUSE-SU-2025:20096-1 | Not reported |
| Suse | python-tornado6 | rpm | linux micro 6.1 | 6.4-slfo.1.1_2.1 | Not reported | SUSE-SU-2025:20445-1 | Not reported |
| Suse | python-tornado6 | rpm | linux enterprise module for python 3 15 sp5 | 6.3.2-150400.9.6.1 | Not reported | SUSE-SU-2024:4137-1 | Not reported |
| Suse | python-tornado6 | rpm | linux enterprise module for python 3 15 sp6 | 6.3.2-150400.9.6.1 | Not reported | SUSE-SU-2024:4137-1 | Not reported |
| Opensuse | python-tornado6 | rpm | leap 15.5 | 6.3.2-150400.9.6.1 | Not reported | SUSE-SU-2024:4137-1 | Not reported |
| Opensuse | python-tornado6 | rpm | leap 15.6 | 6.3.2-150400.9.6.1 | Not reported | SUSE-SU-2024:4137-1 | Not reported |
| Opensuse | python-tornado6 | rpm | tumbleweed | 6.4.2-1.1 | Not reported | OPENSUSE-SU-2024:14528-1 | Not reported |
| Ubuntu | python-tornado | deb | pro | 6.1.0-3ubuntu0.1~esm1 | Not reported | UBUNTU-CVE-2024-52804 | Not reported |
| Ubuntu | python-tornado | deb | 24.04 | 6.4.0-1ubuntu0.1 | Not reported | UBUNTU-CVE-2024-52804 | Not reported |
| Ubuntu | python-tornado | deb | 25.10 | 6.4.2-1 | Not reported | UBUNTU-CVE-2024-52804 | Not reported |
OpenFactory catalog packages
[openSUSE Tumbleweed]
- [python313-tornado6]Unknown
Source package: [python-tornado6]
Details (1)
6.5.8-1.1· x86_64 · tumbleweedUnknown · Fixed:
6.4.2-1.1Version impact unknown
usn · python-tornado6 · opensuse · tumbleweed
- [python314-tornado6]Unknown
Source package: [python-tornado6]
Details (1)
6.5.8-1.1· x86_64 · tumbleweedUnknown · Fixed:
6.4.2-1.1Version impact unknown
usn · python-tornado6 · opensuse · tumbleweed
[Debian 12 (Bookworm)]
- [python3-tornado]Fixed
Source package: [python-tornado]
Details (4)
6.2.0-3+deb12u4· amd64 · bookwormFixed · Fixed:
6.2.0-3+deb12u1usn · python-tornado · debian · bookworm; usn · python-tornado · debian · 12
6.2.0-3+deb12u4· arm64 · bookwormFixed · Fixed:
6.2.0-3+deb12u1usn · python-tornado · debian · bookworm; usn · python-tornado · debian · 12
6.2.0-3+deb12u4· amd64 · bookworm-securityFixed · Fixed:
6.2.0-3+deb12u1usn · python-tornado · debian · bookworm; usn · python-tornado · debian · 12
6.2.0-3+deb12u4· arm64 · bookworm-securityFixed · Fixed:
6.2.0-3+deb12u1usn · python-tornado · debian · bookworm; usn · python-tornado · debian · 12
- [python-tornado-doc]Fixed
Source package: [python-tornado]
Details (4)
6.2.0-3+deb12u4· all · bookwormFixed · Fixed:
6.2.0-3+deb12u1usn · python-tornado · debian · bookworm; usn · python-tornado · debian · 12
6.2.0-3+deb12u4· all · bookwormFixed · Fixed:
6.2.0-3+deb12u1usn · python-tornado · debian · bookworm; usn · python-tornado · debian · 12
6.2.0-3+deb12u4· all · bookworm-securityFixed · Fixed:
6.2.0-3+deb12u1usn · python-tornado · debian · bookworm; usn · python-tornado · debian · 12
6.2.0-3+deb12u4· all · bookworm-securityFixed · Fixed:
6.2.0-3+deb12u1usn · python-tornado · debian · bookworm; usn · python-tornado · debian · 12
[Debian 13 (Trixie)]
- [python3-tornado]Fixed
Source package: [python-tornado]
Details (4)
6.4.2-3+deb13u2· amd64 · trixieFixed · Fixed:
6.4.2-1usn · python-tornado · debian · 13
6.4.2-3+deb13u2· arm64 · trixieFixed · Fixed:
6.4.2-1usn · python-tornado · debian · 13
6.4.2-3+deb13u2· amd64 · trixie-securityFixed · Fixed:
6.4.2-1usn · python-tornado · debian · 13
6.4.2-3+deb13u2· arm64 · trixie-securityFixed · Fixed:
6.4.2-1usn · python-tornado · debian · 13
- [python-tornado-doc]Fixed
Source package: [python-tornado]
Details (4)
6.4.2-3+deb13u2· all · trixieFixed · Fixed:
6.4.2-1usn · python-tornado · debian · 13
6.4.2-3+deb13u2· all · trixieFixed · Fixed:
6.4.2-1usn · python-tornado · debian · 13
6.4.2-3+deb13u2· all · trixie-securityFixed · Fixed:
6.4.2-1usn · python-tornado · debian · 13
6.4.2-3+deb13u2· all · trixie-securityFixed · Fixed:
6.4.2-1usn · python-tornado · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/suse-su-2024_4137-1.json]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2024-52804]
- [https://osv.dev/vulnerability/SUSE-SU-2024:4137-1]
- [https://osv.dev/vulnerability/SUSE-SU-2025:20096-1]
- [https://osv.dev/vulnerability/SUSE-SU-2025:20445-1]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2024-52804]
- [https://osv.dev/vulnerability/openSUSE-SU-2024:14528-1]
- [https://security-tracker.debian.org/tracker/CVE-2024-52804]
- [https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-52804.json]
- [https://ubuntu.com/security/notices/USN-7150-1]
- [https://wid.cert-bund.de/.well-known/csaf/white/2024/wid-sec-w-2024-3569.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX] · [Ubuntu Security Notices (USN)]