Medium [CVE-2026-93856] Information disclosure via Block Storage API message listing
This medium-severity Red Hat Linux advisory covers CVE-2026-93856; related products: Red Hat OpenStack Platform 13 (Queens), Red Hat OpenStack Platform 16.2, Red Hat OpenStack Platform 17.1.
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Summary
Information disclosure via Block Storage API message listing. Red Hat rates this moderate (CVSS 4.3).
Weakness: CWE-201.
Affected products named by the advisory: Red Hat OpenStack Platform 13 (Queens); Red Hat OpenStack Platform 16.2; Red Hat OpenStack Platform 17.1; Red Hat OpenStack Platform 18.0.
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 13 hours 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 13 hours ago·verify at source
Mitigation checklist
- Operators can shorten how long these messages remain available by lowering the Cinder message_ttl option. The default is 2592000 seconds (30 days). A periodic task removes expired messages. That task runs on the message_reap_interval, which defaults to 86400 seconds (24 hours). This reduces the window during which another project's error messages can be listed. It does not prevent the list API from returning messages that have not yet expired.
Official advisory · high-confidence parse· fetched 13 hours ago·verify at source
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