{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-33356 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-33356 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-33356 is a high-severity missing authorization vulnerability in Meari IoT Cloud MQTT Broker EMQX, published on 11 May 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-33356 and fix it if it is affected.\n\nWhat it is: CVE-2026-33356 is a high-severity missing authorization vulnerability in Meari IoT Cloud MQTT Broker EMQX, published on 11 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-33356 in the wild and no public exploit code.\n\nAffected product: Meari IoT Cloud MQTT Broker EMQX. 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-2026-33356/ (Markdown: https://insights.sbomify.com/CVE-2026-33356/index.md)","id":"CVE-2026-33356","markdown":"https://insights.sbomify.com/CVE-2026-33356/index.md","name":"CVE-2026-33356","record":{"aliases":["GHSA-2vfr-ch7v-7754"],"analysis":{"component_type":"iot_embedded","fix_type":"no_fix_stated","impacts":["data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"Meari IoT Cloud Broker","requires_auth":"low_privilege","summary":"Authenticated users can subscribe to global topics to read telemetry from devices they do not own due to missing per-device subscribe ACLs.","user_interaction":"not_required","vuln_class":"missing_authorization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"runZero","cpe":[],"cvss":{"score":7.7,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","version":"3.1"},"cwes":[{"id":"CWE-639","name":"Authorization Bypass Through User-Controlled Key"}],"description":"In Meari IoT Cloud MQTT Broker deployments running EMQX 4.x, any authenticated low-privilege account can subscribe to global wildcard topics and receive telemetry from devices the user does not own. The broker enforces publish restrictions but does not enforce equivalent subscribe authorization at per-device scope.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"Meari MQTT broker missing per-device subscribe ACL","id":"CVE-2026-33356","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"missing_authorization","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"Meari OpenAPI device status IDOR","id":"CVE-2026-33357"},"packages":[],"prev":{"headline":"Discourse filters whisper posts from private-posts feed","id":"CVE-2026-33355"},"products":["IoT Cloud MQTT Broker EMQX"],"published":"2026-05-11","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":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-05-11","vendors":["Meari"]},"summary":"Authenticated users can subscribe to global topics to read telemetry from devices they do not own due to missing per-device subscribe ACLs.","url":"https://insights.sbomify.com/CVE-2026-33356/"}