# RHSA-2026:16699: python3.12 security update

RHSA-2026:16699, released April 30, 2026, fixes 2 CVEs in python3.12 (version 3.12.9-2.el10_0.9). None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/rhsa-2026-16699
- Platform: Linux
- Released: Apr 30, 2026
- Priority: High (Closes CVE-2026-6100, high severity)
- CVEs: 2, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://access.redhat.com/errata/RHSA-2026:16699

## 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_0.9 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2026-6100](https://patchblox.com/security/data/cve/CVE-2026-6100.md) | High | Use-after-free in lzma.LZMADecompressor, bz2.BZ2Decompressor, and gzip.GzipFile after re-use under memory pressure | 9.1 | 0.0058 |  |
| [CVE-2026-4786](https://patchblox.com/security/data/cve/CVE-2026-4786.md) | High | Incomplete mitigation of CVE-2026-4519, %action expansion for command injection to webbrowser.open() | 8.1 | 0.0029 |  |

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Data as of 2026-11-07T06:34:28Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo