# CVE-2026-26018: CoreDNS Loop Detection Denial of Service Vulnerability

CVE-2026-26018 is fixed in 2 products on 1 platform, first by SUSE-SU-2026:1042-1, released March 25, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-26018
- Priority: High
- CVSS: 7.5 (Important)
- EPSS: 0.0124
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 9, 2026
- Weakness: Predictable Seed in Pseudo-Random Number Generator (PRNG)
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26018

## Description

This update for coredns fixes the following issues:  Changes in coredns:  - Update to version 1.14.2:   * plugin/reload: Allow disabling jitter with 0s   * bump deps   * plugin/forward: fix parsing error when handling TLS+IPv6 address   * plugin/loop: use crypto/rand for query name generation   * plugin: reorder rewrite before acl to prevent bypass   * fix(rewrite): fix cname target rewrite for CNAME chains   * fix(kubernetes): panic on empty ListenHosts   * chore: bump minimum Go version to 1.25   * feat(proxyproto): add proxy protocol support   * refactor(cache): modernize with generics   * Add metadata for response Type and Class to Log   * docs: clarify kubernetes auth docs   * fix: return SOA and NS records when queried for a record CNAMEd to origin  - fixes bsc#1259320 CVE-2026-26017 - fixes bsc#1259319 CVE-2026-26018  - address more unstable unstable tests under aarch64 and s390x  - Update to version 1.14.1:   * This release primarily addresses security vulnerabilities affecting Go     versions prior to Go 1.25.6 and Go 1.24.12     (CVE-2025-61728, CVE-2025-61726, CVE-2025-68121, CVE-2025-61731,      CVE-2025-68119).      It also includes performance improvements to the proxy plugin via      multiplexed connections, along with various documentation updates.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | coredns opensuse-leap 16.0 | 1.14.2-bp160.1.1 | [OPENSUSE-SU-2026:20619-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20619-1.md) | Apr 23, 2026 |
| Linux | govulncheck-vulndb opensuse-leap 15.6 | 0.0.20260317T205859-150000.1.152.1 | [SUSE-SU-2026:1042-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1042-1.md) | Mar 25, 2026 |
| Linux | govulncheck-vulndb opensuse-leap 16.0 | 0.0.20260723T184607-160000.1.1 | [OPENSUSE-SU-2026:21483-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21483-1.md) | Jul 30, 2026 |

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Data as of 2026-11-10T13:56:55Z 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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