CoreDNS is a DNS server that chains plugins. Prior to version 1.14.2, a logical vulnerability in CoreDNS allows DNS access controls to be bypassed due to the default execution order of plugins. Security plugins such as acl are evaluated before the rewrite plugin, resulting in a Time-of-Check Time-of-Use (TOCTOU) flaw. This issue has been patched in version 1.14.2.

An update of the coredns package has been released.

The remote openSUSE 16 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:20619-1 advisory.

    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.

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - CoreDNS is a DNS server that chains plugins. Prior to version 1.14.2, a logical vulnerability in CoreDNS
    allows DNS access controls to be bypassed due to the default execution order of plugins. Security plugins
    such as acl are evaluated before the rewrite plugin, resulting in a Time-of-Check Time-of-Use (TOCTOU)
    flaw. This issue has been patched in version 1.14.2. (CVE-2026-26017)

ID	Name	Product	Family	Severity
321834	Photon OS 4.0: Coredns PHSA-2026-4.0-1038	Nessus	PhotonOS Local Security Checks	high
310251	openSUSE 16 Security Update : coredns (openSUSE-SU-2026:20619-1)	Nessus	SuSE Local Security Checks	critical
303584	Photon OS 5.0: Coredns PHSA-2026-5.0-0794	Nessus	PhotonOS Local Security Checks	medium
438447	SCA: security update for github.com/coredns/coredns (GHSA-c9v3-4pv7-87pr)	Tenable Cloud Security	SCA Checks	medium
438447	SCA: security update for github.com/coredns/coredns (GHSA-c9v3-4pv7-87pr)	Tenable Self-Hosted Container Security	SCA Checks	medium

Detections

Analytics

CVE-2026-26017

medium

Tenable Plugins

high

critical

medium

medium

medium