# RHSA-2026:80741: python-tornado security update

RHSA-2026:80741, released September 14, 2026, fixes 4 CVEs in python-tornado (version 6.5.8-0.el10_0.1). None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/rhsa-2026-80741
- Platform: Linux
- Released: Sep 14, 2026
- Priority: High (Closes CVE-2026-49855, high severity)
- CVEs: 4, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://access.redhat.com/errata/RHSA-2026:80741

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [python-tornado](https://patchblox.com/security/data/product/linux/python-tornado.md) | RHEL 10 | 6.5.8-0.el10_0.1 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2026-49855](https://patchblox.com/security/data/cve/CVE-2026-49855.md) | High | python3-tornado: Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, excepti... | 7.7 | 0.0057 |  |
| [CVE-2026-49853](https://patchblox.com/security/data/cve/CVE-2026-49853.md) | High | python-tornado: Tornado is a Python web framework and asynchronous networking library | 7.7 | 0.0045 |  |
| [CVE-2026-91990](https://patchblox.com/security/data/cve/CVE-2026-91990.md) | High | python3-tornado: Tornado before 6.5.8 contains a memory amplification vulnerability in parse_multipart_form_data that splits multipart... | 7.5 | 0.0042 |  |
| [CVE-2026-82397](https://patchblox.com/security/data/cve/CVE-2026-82397.md) | High | python3-tornado: Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, excepti... | 7.5 | 0.0035 |  |

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Data as of 2026-11-07T12:40:37Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo