VDB
DEBIAN-CVE-2026-31958
DEBIAN-CVE-2026-31958
PUBLISHED
CVSS 7.5 HIGH
Tornado is a Python web framework and asynchronous networking library. In versions of Tornado prior to 6.5.5, the only limit on the number of parts in multipart/form-data is the max_body_size setting (default 100MB). Since parsing occurs synchronously on the main thread, this creates the possibility of denial-of-service due to the cost of parsing very large multipart bodies with many parts. This vulnerability is fixed in 6.5.5.
Risk Scores
CVSS 3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Debian:12 | python-tornado | 6.2.0-3, 6.2.0-3+deb12u3, 6.2.0-3+deb12u4 |
| Debian:14 | python-tornado | 0, 6.4.2-3, 6.5.2-1 |
| Debian:11 | python-tornado | 0, 6.1.0-1, 6.1.0-1+deb11u2 |
| Debian:13 | python-tornado | 0, 6.4.2-3, * |
Timeline
- Mar 11, 2026 CVE Published
- Apr 28, 2026 CVE Updated