{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-45266 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-45266 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-45266 is a low-severity missing authorization vulnerability in nextcloud security-advisories, published on 1 Jun 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-45266 and fix it if it is affected.\n\nWhat it is: CVE-2026-45266 is a low-severity missing authorization vulnerability in nextcloud security-advisories, published on 1 Jun 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-45266 in the wild and no public exploit code.\n\nAffected product: nextcloud security-advisories. 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-2026-45266/ (Markdown: https://insights.sbomify.com/CVE-2026-45266/index.md)","id":"CVE-2026-45266","markdown":"https://insights.sbomify.com/CVE-2026-45266/index.md","name":"CVE-2026-45266","record":{"aliases":["GHSA-x75r-65hm-cw35"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Nextcloud collaboration platform","requires_auth":"low_privilege","summary":"Low-privileged users can force-mute other participants in Nextcloud calls due to missing permission checks when internal signaling is used.","user_interaction":"required","vuln_class":"missing_authorization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":3.5,"severity":"low","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-284","name":"Improper Access Control"}],"description":"Nextcloud is an open source content collaboration platform. Prior to versions 21.1.10, 22.0.11, and 23.0.3, a low-privileged user can force other user's microphones to be muted in calls when no High-performance Backend is installed. This issue has been patched in versions 21.1.10, 22.0.11, and 23.0.3.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":false,"headline":"Nextcloud: Unauthorized force-mute from missing permission check when using internal signaling","id":"CVE-2026-45266","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"missing_authorization","year":"2026"},"n_packages":0,"n_references":3,"next":{"headline":"Nextcloud: Missing permission check for from submissions","id":"CVE-2026-45267"},"packages":[],"prev":{"headline":"Nextcloud: ACL Rename Permission Bypass in Team Folders Allows Unauthorized File Renames","id":"CVE-2026-45264"},"products":["security-advisories"],"published":"2026-06-01","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":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-06-01","vendors":["nextcloud"]},"summary":"Low-privileged users can force-mute other participants in Nextcloud calls due to missing permission checks when internal signaling is used.","url":"https://insights.sbomify.com/CVE-2026-45266/"}