Medium [CVE-2026-87054] containers-policy.json defaults to insecureAcceptAnything for non-Red Hat registries
This medium-severity Red Hat Linux advisory covers CVE-2026-87054.
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Summary
A flaw was found in operator-sdk-builder. The containers-policy.json configuration file defaults to insecureAcceptAnything for container image registries that are not explicitly listed.
This default setting causes signature verification to be entirely skipped for images pulled from these unlisted registries, which could allow for the use of untrusted or malicious container images. This could enable the use of untrusted container images if not explicitly configured, increasing the risk of supply chain attacks.
Red Hat severity: Moderate — CVSS 4.2 (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N). Weakness: CWE-345.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
Mitigation checklist
- To prevent the use of untrusted container images, configure the `containers-policy.json` to reject unsigned images by default. Set the `default` policy to `{"type": "reject"}` and add explicit `signedBy` or `sigstoreSigned` entries for all trusted registries. This policy should be mounted when invoking `opm` or `operator-sdk` against third-party registries. A restart of the `operator-sdk-builder` or related services may be required for the new policy to be enforced.
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
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