# ELSA-2026-21391: Security update for 11 packages

ELSA-2026-21391, released June 23, 2026, fixes 5 CVEs across 11 products. None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/elsa-2026-21391
- Platform: Linux
- Released: Jun 23, 2026
- Priority: High (Closes CVE-2026-28780, high severity)
- CVEs: 5, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://linux.oracle.com/errata/ELSA-2026-21391.html

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [httpd](https://patchblox.com/security/data/product/linux/httpd.md) | ol 9 | 0:2.4.62-13.0.1.el9_8.1 |
| [httpd-core](https://patchblox.com/security/data/product/linux/httpd-core.md) | ol 9 | 0:2.4.62-13.0.1.el9_8.1 |
| [httpd-devel](https://patchblox.com/security/data/product/linux/httpd-devel.md) | ol 9 | 0:2.4.62-13.0.1.el9_8.1 |
| [httpd-filesystem](https://patchblox.com/security/data/product/linux/httpd-filesystem.md) | ol 9 | 0:2.4.62-13.0.1.el9_8.1 |
| [httpd-manual](https://patchblox.com/security/data/product/linux/httpd-manual.md) | ol 9 | 0:2.4.62-13.0.1.el9_8.1 |
| [httpd-tools](https://patchblox.com/security/data/product/linux/httpd-tools.md) | ol 9 | 0:2.4.62-13.0.1.el9_8.1 |
| [mod_ldap](https://patchblox.com/security/data/product/linux/mod-ldap.md) | ol 9 | 0:2.4.62-13.0.1.el9_8.1 |
| [mod_lua](https://patchblox.com/security/data/product/linux/mod-lua.md) | ol 9 | 0:2.4.62-13.0.1.el9_8.1 |
| [mod_proxy_html](https://patchblox.com/security/data/product/linux/mod-proxy-html.md) | ol 9 | 1:2.4.62-13.0.1.el9_8.1 |
| [mod_session](https://patchblox.com/security/data/product/linux/mod-session.md) | ol 9 | 0:2.4.62-13.0.1.el9_8.1 |
| [mod_ssl](https://patchblox.com/security/data/product/linux/mod-ssl.md) | ol 9 | 1:2.4.62-13.0.1.el9_8.1 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2026-28780](https://patchblox.com/security/data/cve/CVE-2026-28780.md) | High | httpd: Heap-based Buffer Overflow vulnerability in mod_proxy_ajp of Apache HTTP Server. If mod_proxy_ajp connects to a malic... | 9.8 | 0.0138 |  |
| [CVE-2026-33007](https://patchblox.com/security/data/cve/CVE-2026-33007.md) | High | Apache HTTP Server: mod_authn_socache crash | 8.2 | 0.0051 |  |
| [CVE-2026-34032](https://patchblox.com/security/data/cve/CVE-2026-34032.md) | High | Apache HTTP Server: mod_proxy_ajp: Heap Buffer Over-Read Due to Missing Null-Termination Check (ajp_msg_get_string) | 8.2 | 0.0049 |  |
| [CVE-2026-34059](https://patchblox.com/security/data/cve/CVE-2026-34059.md) | High | Apache HTTP Server: mod_proxy_ajp: Heap Over-Read and memory disclosure in  ajp_parse_data() | 8.2 | 0.0039 |  |
| [CVE-2026-33857](https://patchblox.com/security/data/cve/CVE-2026-33857.md) | High | Apache HTTP Server: Off-by-one OOB reads in AJP getter functions | 8.2 | 0.0039 |  |

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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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