What is GHSA-wwvv-qf38-wpf3?

GHSA-wwvv-qf38-wpf3 is a security advisory published by GitHub Security Advisories with High severity. Tornado before 6.5.8 contains a memory amplification vulnerability in parse_multipart_form_data...

Which CVE IDs does GHSA-wwvv-qf38-wpf3 cover?

GHSA-wwvv-qf38-wpf3 covers the following CVE IDs: CVE-2026-91990. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-wwvv-qf38-wpf3?

GHSA-wwvv-qf38-wpf3 has a CVSS v3 base score of 7.5, published by GitHub Security Advisories.

GHSA-wwvv-qf38-wpf3HighCVSS 7.5

Tornado before 6.5.8 contains a memory amplification vulnerability in parse_multipart_form_data...

Vendor

GitHub Security Advisories

Published

September 15, 2026

Last Modified

September 15, 2026

🔗 CVE IDs covered (1)

CVE-2026-91990 →

📋 Description

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 (4)

https://github.com/tornadoweb/tornado/security/advisories/GHSA-8423-8fgw-73vq
https://nvd.nist.gov/vuln/detail/CVE-2026-91990
https://www.vulncheck.com/advisories/tornado-before-6.5.8-memory-amplification-dos-via-multipart
https://github.com/advisories/GHSA-wwvv-qf38-wpf3