# RHSA-2026:77020: python3.12 security update

RHSA-2026:77020, released October 9, 2026, fixes 2 CVEs in python3.12 (version 3.12.15-1.el10_2). None of them is reported as exploited. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/fix/linux/rhsa-2026-77020
- Platform: Linux
- Released: Oct 9, 2026
- Priority: Urgent (Closes CVE-2026-19445, rated Critical)
- CVEs: 2, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://access.redhat.com/errata/RHSA-2026:77020

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [python3.12](https://patchblox.com/security/data/product/linux/python3.12.md) | RHEL 10 | 3.12.15-1.el10_2 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2026-19445](https://patchblox.com/security/data/cve/CVE-2026-19445.md) | Urgent | Use-after-free of a server-side SSLContext when sni_callback switches contexts | 9.2 | 0.0052 |  |
| [CVE-2026-19553](https://patchblox.com/security/data/cve/CVE-2026-19553.md) | High | SSLContext.wrap_bio() missing validation of server_hostname parameter | 8.1 | 0.0055 |  |

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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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo