# RHSA-2026:22937: image-builder security update

RHSA-2026:22937, released March 12, 2026, fixes 8 CVEs in image-builder (version 52.1-1.el10_2). None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/rhsa-2026-22937
- Platform: Linux
- Released: Mar 12, 2026
- Priority: High (Closes CVE-2025-61726, high severity)
- CVEs: 8, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://access.redhat.com/errata/RHSA-2026:22937

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [image-builder](https://patchblox.com/security/data/product/linux/image-builder.md) | RHEL 10 | 52.1-1.el10_2 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2025-61726](https://patchblox.com/security/data/cve/CVE-2025-61726.md) | High | Memory exhaustion in query parameter parsing in net/url | 9.1 | 0.0229 |  |
| [CVE-2026-33186](https://patchblox.com/security/data/cve/CVE-2026-33186.md) | High | gRPC-Go has an authorization bypass via missing leading slash in :path | 9.1 | 0.0162 |  |
| [CVE-2025-68121](https://patchblox.com/security/data/cve/CVE-2025-68121.md) | High | Unexpected session resumption in crypto/tls | 10.0 | 0.0090 |  |
| [CVE-2026-25679](https://patchblox.com/security/data/cve/CVE-2026-25679.md) | High | Incorrect parsing of IPv6 host literals in net/url | 9.1 | 0.0083 |  |
| [CVE-2026-34986](https://patchblox.com/security/data/cve/CVE-2026-34986.md) | High | osbuild-composer: A service for building customized OS artifacts, such as VM images and OSTree commits, that uses osbuild under the hood | 9.1 | 0.0066 |  |
| [CVE-2026-27137](https://patchblox.com/security/data/cve/CVE-2026-27137.md) | High | Incorrect enforcement of email constraints in crypto/x509 | 9.1 | 0.0066 |  |
| [CVE-2026-32283](https://patchblox.com/security/data/cve/CVE-2026-32283.md) | High | Unauthenticated TLS 1.3 KeyUpdate record can cause persistent connection retention and DoS in crypto/tls | 9.1 | 0.0063 |  |
| [CVE-2026-32282](https://patchblox.com/security/data/cve/CVE-2026-32282.md) | High | TOCTOU permits root escape on Linux via Root.Chmod in os in internal/syscall/unix | 9.1 | 0.0030 |  |

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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo