# RHSA-2026:5315: python3.12 security update

RHSA-2026:5315, released January 23, 2026, fixes 3 CVEs in python3.12 (version 3.12.9-2.el10_0.7). None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/rhsa-2026-5315
- Platform: Linux
- Released: Jan 23, 2026
- Priority: High (Closes CVE-2026-1299, high severity)
- CVEs: 3, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://access.redhat.com/errata/RHSA-2026:5315

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [python3.12](https://patchblox.com/security/data/product/linux/python3.12.md) | RHEL 10 | 3.12.9-2.el10_0.7 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2026-1299](https://patchblox.com/security/data/cve/CVE-2026-1299.md) | High | email BytesGenerator header injection due to unquoted newlines | 7.1 | 0.0057 |  |
| [CVE-2025-15366](https://patchblox.com/security/data/cve/CVE-2025-15366.md) | High | IMAP command injection in user-controlled commands | 7.1 | 0.0043 |  |
| [CVE-2025-15367](https://patchblox.com/security/data/cve/CVE-2025-15367.md) | High | POP3 command injection in user-controlled commands | 7.1 | 0.0038 |  |

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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo