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VulnerabilityPublished Updated

CVE-2024-52804: Nvchecker · Tornado has an HTTP cookie parsing DoS vulnerability

Affects nvcheckerSource GCVE Database

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Mentioned vulnerabilities

Authoritative record:CVE-2024-52804· High 7.5

Not known to be exploited · CVSS 7.5 High : upgrade to 2.15.1_2 soon.

Data as of 30 Oct 2026, 07:30 UTC

CVSS 3.1 base score
7.5High
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (GitHub_M)CVSS 3.17.5
Patch
Available – fixed in 2.15.1_2
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 22 Nov 2024

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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 nvchecker to 2.15.1_2.

Affected software

ProductAffectedFixed in
Homebrewnvcheckerpkg:brew/nvcheckerOther threatsAffected
  • >=2.7 <2.15.1_2
Fixed in
  • 2.15.1_2

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

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