# DSA-5043-1: lxml security update

DSA-5043-1, released January 12, 2022, fixes 1 CVE in lxml (version 4.6.3+dfsg-0.1+deb11u1). None of them is reported as exploited. Patch Radar priority: High. The product is no longer supported.

- Web page: https://patchblox.com/security/fix/linux/dsa-5043-1
- Platform: Linux
- Released: Jan 12, 2022
- Priority: High (Closes CVE-2021-43818, high severity)
- CVEs: 1, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://security-tracker.debian.org/tracker/CVE-2021-43818

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [lxml](https://patchblox.com/security/data/product/linux/lxml.md) | Debian 11.6 (bullseye) | 4.6.3+dfsg-0.1+deb11u1 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2021-43818](https://patchblox.com/security/data/cve/CVE-2021-43818.md) | High | python39-urllib3: Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, excepti... | 8.8 | 0.0266 |  |

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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo