# RLSA-2026:55804: nghttp2 security update

RLSA-2026:55804, released August 18, 2026, fixes 1 CVE in nghttp2 (version 0:1.33.0-6.el8_10.3). None of them is reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/fix/linux/rlsa-2026-55804
- Platform: Linux
- Released: Aug 18, 2026
- Priority: Routine (Closes CVE-2026-58055)
- CVEs: 1, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://errata.rockylinux.org/RLSA-2026:55804

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [nghttp2](https://patchblox.com/security/data/product/linux/nghttp2.md) | rocky 8 | 0:1.33.0-6.el8_10.3 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2026-58055](https://patchblox.com/security/data/cve/CVE-2026-58055.md) | Routine | nghttp2 nghttpx - HTTP Request/Response Smuggling via Upgrade Request with Content-Length | 5.4 | 0.0025 |  |

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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo