CVE-2024-52804
highpriority · track · 0EPSS 0.010 · 64 %ileDEEURUUSEPSS · scored 2026-10-27
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.9–7.5
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (39)
Products and version ranges known to be affected.
advisories (3)
Vendor and ecosystem advisories describing this.
- WID-SEC-W-2024-3569Red Hat Enterprise Linux (python-tornado): Schwachstelle ermöglicht Denial of ServiceDeutsch2024-12-01csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Red Hat Enterprise Linux ausnutzen, um einen Denial of Service Angriff durchzuführen.
- GHSA-8w49-h785-mj3cTornado has an HTTP cookie parsing DoS vulnerability2024-11-22ghsa · osvUS
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. See also CVE-2024-7592 for a similar vulnerability in cpython.
- PYSEC-2026-1975Tornado has an HTTP cookie parsing DoS vulnerability2026-07-07vendor · osvUS
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. See also CVE-2024-7592 for a similar vulnerability in cpython.
also known as (7)
Other names and identifiers for this entity.
sources
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references (13)
External citations — patches, advisories, analysis.
- https://access.redhat.com/security/cve/cve-2024-52804cnnvd
- https://github.com/advisories/GHSA-7pwv-g7hj-39prcnnvd
- https://github.com/tornadoweb/tornado/commit/d5ba4a1695fbf7c6a3e54313262639b198291533cnnvd
- https://github.com/tornadoweb/tornado/releases/tag/v6.4.2Patchcnnvd
- https://github.com/tornadoweb/tornado/security/advisories/GHSA-8w49-h785-mj3ccnnvd
- https://nvd.nist.gov/vuln/detail/CVE-2024-52804cnnvd
- https://github.com/advisories/GHSA-7pwv-g7hj-39prenisa_euvd
- https://github.com/tornadoweb/tornado/commit/d5ba4a1695fbf7c6a3e54313262639b198291533enisa_euvd
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