CVE-2024-52804: Jupyterlab · Tornado has an HTTP cookie parsing DoS vulnerability
Affects jupyterlabSource GCVE Database
Mentioned vulnerabilities
Not known to be exploited · CVSS 7.5 High : upgrade to 4.3.1_1 soon.
Data as of 30 Oct 2026, 07:30 UTC
Thin evidence
One scorer or none| CNA (GitHub_M) | CVSS 3.1 | 7.5 |
|---|
- Patch
- Available – fixed in 4.3.1_1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 22 Nov 2024
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.
What to do
Upgrade jupyterlab to 4.3.1_1.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Homebrewjupyterlabpkg:brew/jupyterlabOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
Description
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.
References
- github.com/tornadoweb/tornado/security/advisories/GHSA-8w49-h785-mj3c (opens in a new tab)
- nvd.nist.gov/vuln/detail/CVE-2024-52804 (opens in a new tab)
- github.com/tornadoweb/tornado/commit/d5ba4a1695fbf7c6a3e54313262639b198291533 (opens in a new tab)
- github.com/tornadoweb/tornado (opens in a new tab)
- lists.debian.org/debian-lts-announce/2025/01/msg00000.html (opens in a new tab)