Allocation of Resources Without Limits or Throttling The advisory has been revoked - it doesn't affect any version of package python-tornado (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-RHEL10-PYTHONTORNADO-19842778
- published16 Sept 2026
- disclosed15 Sept 2026
Introduced: 15 Sep 2026
CVE-2026-91990 (opens in a new tab)Amendment
The Red Hat security team deemed this advisory irrelevant for RHEL:10.
NVD Description
Note: Versions mentioned in the description apply only to the upstream python-tornado package and not the python-tornado package as distributed by RHEL.
Tornado before 6.5.8 contains a memory amplification vulnerability in parse_multipart_form_data that splits multipart data before validating the max_parts limit. Attackers can send crafted multipart requests with many parts to create large transient lists, exhausting server memory and causing denial of service.
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2533953
- https://access.redhat.com/security/cve/CVE-2026-91990
- https://access.redhat.com/errata/RHSA-2026:67147
- https://access.redhat.com/errata/RHSA-2026:80741
- https://www.vulncheck.com/advisories/tornado-before-6.5.8-memory-amplification-dos-via-multipart
- https://github.com/tornadoweb/tornado/security/advisories/GHSA-8423-8fgw-73vq