{"answers":{"affected":"","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-93856 exists.","fix":"No fix has been published for CVE-2026-93856 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-93856 is a medium-severity vulnerability in OpenStack Cinder, published on 21 Oct 2026."},"fix_prompt":"Check this codebase for CVE-2026-93856 and fix it if it is affected.\n\nWhat it is: CVE-2026-93856 is a medium-severity vulnerability in OpenStack Cinder, published on 21 Oct 2026. \nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-93856 exists.\n\nAffected product: OpenStack Cinder. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-93856/ (Markdown: https://insights.sbomify.com/CVE-2026-93856/index.md)","id":"CVE-2026-93856","markdown":"https://insights.sbomify.com/CVE-2026-93856/index.md","name":"CVE-2026-93856","record":{"aliases":["DEBIAN-CVE-2026-93856","GHSA-rgvg-xc9j-2jxv","UBUNTU-CVE-2026-93856"],"analysis":null,"analysis_generated_by":null,"assigner":"mitre","cpe":[],"cvss":{"score":4.3,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","version":"3.1"},"cwes":[{"id":"CWE-669","name":"Incorrect Resource Transfer Between Spheres"}],"description":"In OpenStack Cinder through 29.0.0, cross-project information disclosure can occur in the Messages API. A non-admin user with the project-scoped 'member' or 'reader' role making the Block Storage API v3.3 \"List messages\" call finds the non-expired user messages for other projects included in the response, resulting in the leakage of UUIDs of resources owned by other projects, in addition to the user message about the other projects' resources (which, by design, are sanitized generic messages). All Cinder deployments are affected.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":false,"headline":"In OpenStack Cinder through 29.0.0, cross-project information disclosure can occur in the Messages API.","id":"CVE-2026-93856","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":null,"year":"2026"},"n_packages":0,"n_references":3,"next":{"headline":"Fireware OS Pre-Authentication Stack Buffer Overflow in SIP Proxy Allows Remote Code Execution","id":"CVE-2026-93857"},"packages":[],"prev":{"headline":"SendPress Newsletters \u003c= 1.26.1.20 - Unauthenticated SQL Injection via 'subscriberid' Parameter","id":"CVE-2026-93855"},"products":["Cinder"],"published":"2026-10-21","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-10-21","vendors":["OpenStack"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-93856/"}