# CVE-2026-49853: python-tornado: Tornado is a Python web framework and asynchronous networking library

CVE-2026-49853 is fixed in 10 products on 1 platform, first by OPENSUSE-SU-2026:21067-1, released June 26, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-49853
- Priority: High
- CVSS: 7.7 (important)
- EPSS: 0.0045
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jun 26, 2026

## Description

Tornado is a Python web framework and asynchronous networking library. Prior to 6.5.6, SimpleAsyncHTTPClient shallow-copied redirected requests and removed only the Host header, leaving Authorization, auth_username, auth_password, and auth_mode in place when a redirect changed scheme, host, or port. This issue is fixed in version 6.5.6.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | python-tornado RHEL 10 | 6.5.8-0.el10_0.1 | [RHSA-2026:80741](https://patchblox.com/security/data/fix/linux/rhsa-2026-80741.md) | Sep 14, 2026 |
| Linux | python-tornado rocky 10 | 0:6.5.8-0.el10_2.1 | [RLSA-2026:67147](https://patchblox.com/security/data/fix/linux/rlsa-2026-67147.md) | Sep 15, 2026 |
| Linux | python-tornado rocky 9 | 0:6.5.8-0.el9_8.1 | [RLSA-2026:67146](https://patchblox.com/security/data/fix/linux/rlsa-2026-67146.md) | Sep 15, 2026 |
| Linux | python-tornado sles 15.6 | 4.5.3-150000.3.22.1 | [SUSE-SU-2026:2726-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2726-1.md) | Jul 2, 2026 |
| Linux | python-tornado sles 15.7 | 4.5.3-150000.3.22.1 | [SUSE-SU-2026:2726-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2726-1.md) | Jul 2, 2026 |
| Linux | python-tornado-debugsource amzn 2023 | 6.1.0-2.amzn2023.0.9 | [ALAS2023-2026-2016](https://patchblox.com/security/data/fix/linux/alas2023-2026-2016.md) | Aug 3, 2026 |
| Linux | python-tornado-doc amzn 2023 | 6.1.0-2.amzn2023.0.9 | [ALAS2023-2026-2016](https://patchblox.com/security/data/fix/linux/alas2023-2026-2016.md) | Aug 3, 2026 |
| Linux | python-tornado6 opensuse-leap 16.0 | 6.5-160000.5.1 | [OPENSUSE-SU-2026:21067-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21067-1.md) | Jun 26, 2026 |
| Linux | python-tornado6 sles 15.6 | 6.3.2-150400.9.18.1 | [SUSE-SU-2026:2725-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2725-1.md) | Jul 2, 2026 |
| Linux | python-tornado6 sles 15.7 | 6.3.2-150400.9.18.1 | [SUSE-SU-2026:2725-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2725-1.md) | Jul 2, 2026 |
| Linux | python-tornado6 sles 16.0 | 6.5-160000.5.1 | [SUSE-SU-2026:22373-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-22373-1.md) | Jun 26, 2026 |
| Linux | python3-tornado RHEL 9 | 0:6.5.8-0.el9_8.1 | [RHSA-2026:67146](https://patchblox.com/security/data/fix/linux/rhsa-2026-67146.md) | Sep 19, 2026 |
| Linux | python3-tornado almalinux 10 | 6.5.8-0.el10_2.1 | [ALSA-2026:67147](https://patchblox.com/security/data/fix/linux/alsa-2026-67147.md) | Sep 14, 2026 |
| Linux | python3-tornado almalinux 9 | 6.5.8-0.el9_8.1 | [ALSA-2026:67146](https://patchblox.com/security/data/fix/linux/alsa-2026-67146.md) | Sep 14, 2026 |
| Linux | python3-tornado amzn 2023 | 6.1.0-2.amzn2023.0.9 | [ALAS2023-2026-2016](https://patchblox.com/security/data/fix/linux/alas2023-2026-2016.md) | Aug 3, 2026 |
| Linux | python3-tornado ol 10 | 0:6.5.8-0.el10_2.1 | [ELSA-2026-67147-0](https://patchblox.com/security/data/fix/linux/elsa-2026-67147-0.md) | Sep 14, 2026 |
| Linux | python3-tornado ol 9 | 0:6.5.8-0.el9_8.1 | [ELSA-2026-67146-0](https://patchblox.com/security/data/fix/linux/elsa-2026-67146-0.md) | Sep 14, 2026 |
| Linux | python3-tornado-debuginfo amzn 2023 | 6.1.0-2.amzn2023.0.9 | [ALAS2023-2026-2016](https://patchblox.com/security/data/fix/linux/alas2023-2026-2016.md) | Aug 3, 2026 |
| Linux | python3.13-tornado amzn 2023 | 6.4.2-1.amzn2023.0.4 | [ALAS2023-2026-2015](https://patchblox.com/security/data/fix/linux/alas2023-2026-2015.md) | Aug 3, 2026 |
| Linux | python3.13-tornado-debuginfo amzn 2023 | 6.4.2-1.amzn2023.0.4 | [ALAS2023-2026-2015](https://patchblox.com/security/data/fix/linux/alas2023-2026-2015.md) | Aug 3, 2026 |
| Linux | python3.13-tornado-debugsource amzn 2023 | 6.4.2-1.amzn2023.0.4 | [ALAS2023-2026-2015](https://patchblox.com/security/data/fix/linux/alas2023-2026-2015.md) | Aug 3, 2026 |
| Linux | python3.13-tornado-doc amzn 2023 | 6.4.2-1.amzn2023.0.4 | [ALAS2023-2026-2015](https://patchblox.com/security/data/fix/linux/alas2023-2026-2015.md) | Aug 3, 2026 |

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Data as of 2026-11-08T13:06:02Z 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

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