# RLSA-2026:1240: fence-agents security update

RLSA-2026:1240, released February 12, 2026, fixes 3 CVEs in fence-agents (version 0:4.2.1-129.el8_10.20). None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/rlsa-2026-1240
- Platform: Linux
- Released: Feb 12, 2026
- Priority: High (Closes CVE-2026-21441, high severity)
- CVEs: 3, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://errata.rockylinux.org/RLSA-2026:1240

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [fence-agents](https://patchblox.com/security/data/product/linux/fence-agents.md) | rocky 8 | 0:4.2.1-129.el8_10.20 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2026-21441](https://patchblox.com/security/data/cve/CVE-2026-21441.md) | High | urllib3 vulnerable to decompression-bomb safeguard bypass when following HTTP redirects (streaming API) | 7.5 | 0.0292 |  |
| [CVE-2025-66418](https://patchblox.com/security/data/cve/CVE-2025-66418.md) | High | urllib3 allows an unbounded number of links in the decompression chain | 7.5 | 0.0073 |  |
| [CVE-2025-66471](https://patchblox.com/security/data/cve/CVE-2025-66471.md) | High | urllib3 Streaming API improperly handles highly compressed data | 7.5 | 0.0073 |  |

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Data as of 2026-11-07T18:46:35Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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