# RHSA-2026:65335: ignition security update

RHSA-2026:65335, released September 10, 2026, fixes 8 CVEs in ignition (version 2.21.0-3.el10_0.4). None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/rhsa-2026-65335
- Platform: Linux
- Released: Sep 10, 2026
- Priority: High (Closes CVE-2026-42499, high severity)
- CVEs: 8, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://access.redhat.com/errata/RHSA-2026:65335

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [ignition](https://patchblox.com/security/data/product/linux/ignition.md) | RHEL 10 | 2.21.0-3.el10_0.4 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2026-42499](https://patchblox.com/security/data/cve/CVE-2026-42499.md) | High | Quadratic string concatenation in consumePhrase in net/mail | 8.8 | 0.0080 |  |
| [CVE-2026-39820](https://patchblox.com/security/data/cve/CVE-2026-39820.md) | High | Quadratic string concatentation in consumeComment in net/mail | 8.8 | 0.0078 |  |
| [CVE-2026-33818](https://patchblox.com/security/data/cve/CVE-2026-33818.md) | High | Enforce maximum recursion depth in encoding/asn1 | 8.8 | 0.0057 |  |
| [CVE-2026-56853](https://patchblox.com/security/data/cve/CVE-2026-56853.md) | High | Apply ReadHeaderTimeout when doing unencrypted HTTP/2 check in net/http | 8.8 | 0.0057 |  |
| [CVE-2026-56859](https://patchblox.com/security/data/cve/CVE-2026-56859.md) | High | Add recursion depth guard during decode in encoding/xml | 8.8 | 0.0057 |  |
| [CVE-2026-56862](https://patchblox.com/security/data/cve/CVE-2026-56862.md) | High | Limit handshake messages we are willing to accept post-handshake in crypto/tls | 8.8 | 0.0057 |  |
| [CVE-2026-56860](https://patchblox.com/security/data/cve/CVE-2026-56860.md) | High | Avoid quadratic complexity in resolvePath in net/url | 8.8 | 0.0055 |  |
| [CVE-2026-56858](https://patchblox.com/security/data/cve/CVE-2026-56858.md) | High | Fix Javascript regexp context tracking in html/template | 8.8 | 0.0031 |  |

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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo