{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-12284 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-12284 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-12284 is a low-severity missing authorization vulnerability in Mattermost, published on 17 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-12284 and fix it if it is affected.\n\nWhat it is: CVE-2026-12284 is a low-severity missing authorization vulnerability in Mattermost, published on 17 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-12284 in the wild and no public exploit code.\n\nAffected product: Mattermost. 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-2026-12284/ (Markdown: https://insights.sbomify.com/CVE-2026-12284/index.md)","id":"CVE-2026-12284","markdown":"https://insights.sbomify.com/CVE-2026-12284/index.md","name":"CVE-2026-12284","record":{"aliases":["GHSA-q4vh-9cg5-4q62"],"analysis":{"component_type":"desktop_application","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Mattermost Desktop App","requires_auth":"none","summary":"A malicious server can disconnect active calls on other connected servers due to missing IPC sender validation in the Mattermost Desktop App.","user_interaction":"not_required","vuln_class":"missing_authorization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Mattermost","cpe":[{"product":"mattermost_desktop","vendor":"mattermost"}],"cvss":{"score":3.8,"severity":"low","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","version":"3.1"},"cwes":[{"id":"CWE-346","name":"Origin Validation Error"}],"description":"Mattermost Desktop App versions \u003c=6.2 6.2.2.0 fails to validate the IPC sender in the leaveCall handler which allows a malicious or compromised Mattermost server (or a user with script access to a connected server view) to disconnect an active call belonging to a different connected server via the desktopAPI.leaveCall IPC message. Mattermost Advisory ID: MMSA-2026-00699","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":"Mattermost Desktop App Missing IPC Sender Validation in Calls Leave Handler","id":"CVE-2026-12284","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"missing_authorization","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Mali GPU Kernel Driver allows access to already freed memory","id":"CVE-2026-12285"},"packages":[],"prev":{"headline":"SQL injection in Amazon Athena Synapse connector","id":"CVE-2026-12283"},"products":["Mattermost"],"published":"2026-09-17","related":[{"cvss_score":9.8,"headline":"Code injection in n/a","id":"CVE-2016-11064","kev_date_added":null,"published":"2020-06-19"},{"cvss_score":9.8,"headline":"Code injection in n/a","id":"CVE-2019-20856","kev_date_added":null,"published":"2020-06-19"},{"cvss_score":8.8,"headline":"Code injection in n/a","id":"CVE-2019-20861","kev_date_added":null,"published":"2020-06-19"},{"cvss_score":7.6,"headline":"Arbitrary application execution via unvalidated server-controlled URLs in Help menu","id":"CVE-2026-1046","kev_date_added":null,"published":"2026-02-16"},{"cvss_score":7.3,"headline":"Security feature bypass in n/a","id":"CVE-2020-14456","kev_date_added":null,"published":"2020-06-19"},{"cvss_score":6.5,"headline":"Posting a malicious markdown image crashes the Mattermost Desktop App","id":"CVE-2026-8075","kev_date_added":null,"published":"2026-07-17"},{"cvss_score":6.5,"headline":"Overly long URLs crash the Mattermost Desktop App","id":"CVE-2026-8683","kev_date_added":null,"published":"2026-06-15"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"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":"2026-09-17","vendors":["Mattermost"]},"summary":"A malicious server can disconnect active calls on other connected servers due to missing IPC sender validation in the Mattermost Desktop App.","url":"https://insights.sbomify.com/CVE-2026-12284/"}