{"answers":{"affected":"1 open source package ship an affected version, including discourse. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-21865 in the wild and no public exploit code.","fix":"Upgrade discourse to a fixed version for your release line: 3.5.4, 2025.11.2, 2025.12.1 or 2026.1.0.","what":"CVE-2026-21865 is a medium-severity missing authorization vulnerability in Discourse Discourse, published on 28 Jan 2026. An attacker needs administrator access to exploit it, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-21865 and fix it if it is affected.\n\nWhat it is: CVE-2026-21865 is a medium-severity missing authorization vulnerability in Discourse Discourse, published on 28 Jan 2026. An attacker needs administrator access to exploit it, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-21865 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- discourse (Bitnami): affected all versions; fixed in 3.5.4, 2025.11.2, 2025.12.1, 2026.1.0\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-2026-21865/ (Markdown: https://insights.sbomify.com/CVE-2026-21865/index.md)","id":"CVE-2026-21865","markdown":"https://insights.sbomify.com/CVE-2026-21865/index.md","name":"CVE-2026-21865","record":{"aliases":["BIT-discourse-2026-21865","GHSA-4777-wrv5-3g39"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["data_read","security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Discourse forum platform","requires_auth":"high_privilege","summary":"Moderators can improperly convert private messages to public topics, exposing private data due to missing authorization checks.","user_interaction":"not_required","vuln_class":"missing_authorization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"discourse","vendor":"discourse"}],"cvss":{"score":6.5,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-862","name":"Missing Authorization"}],"description":"Discourse is an open source discussion platform. In versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0, moderators can convert some personal messages to public topics when they shouldn't have access. This issue is patched in versions 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0. As a workaround, site admin can temporarily revoke the moderation role from untrusted moderators or remove the moderator group from the \"personal message enabled groups\" site setting until the Discourse instance has been upgraded to a version that has been patched.","ecosystems":["Bitnami"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Discourse topic conversion permission vulnerability for moderators","id":"CVE-2026-21865","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Bitnami","product":"discourse:discourse","products":["discourse:discourse"],"type":"missing_authorization","year":"2026"},"n_packages":1,"n_references":1,"next":{"headline":"Dify - Stored XSS in chat","id":"CVE-2026-21866"},"packages":[{"ecosystem":"Bitnami","fixed":["3.5.4","2025.11.2","2025.12.1","2026.1.0"],"introduced":["0","2025.11.0","2025.12.0","2026.1.0"],"last_affected":[],"package":"discourse","purl":"pkg:bitnami/discourse","source":"BIT-discourse-2026-21865"}],"prev":{"headline":"Remote DoS from malformed RESTORE command","id":"CVE-2026-21864"},"products":["discourse"],"published":"2026-01-28","related":[{"cvss_score":10,"headline":"RCE via malicious SNS subscription payload","id":"CVE-2021-41163","kev_date_added":null,"published":"2021-10-20"},{"cvss_score":9.1,"headline":"Discourse vulnerable to RCE via admins uploading maliciously zipped file","id":"CVE-2022-36066","kev_date_added":null,"published":"2022-09-29"},{"cvss_score":8.9,"headline":"Discourse user account takeover via email and invite link","id":"CVE-2022-39356","kev_date_added":null,"published":"2022-11-02"},{"cvss_score":8.8,"headline":"Discourse vulnerable to Cross-site Scripting in local oneboxes","id":"CVE-2023-22468","kev_date_added":null,"published":"2023-01-26"},{"cvss_score":8.7,"headline":"Discourse leaks private topic title and post excerpt via user action API endpoint","id":"CVE-2026-27934","kev_date_added":null,"published":"2026-03-19"},{"cvss_score":8.7,"headline":"Discourse vulnerable to DoS via large URL payload in PM to a bot","id":"CVE-2025-48053","kev_date_added":null,"published":"2025-06-09"},{"cvss_score":8.6,"headline":"Discourse vulnerable to unlimited mentioned users in message serializer","id":"CVE-2023-48297","kev_date_added":null,"published":"2024-01-12"}],"sources":[{"class":"attribution","licence":"Apache-2.0","name":"Bitnami","prefix":"BIT"},{"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":"2026-01-28","vendors":["discourse"]},"summary":"Moderators can improperly convert private messages to public topics, exposing private data due to missing authorization checks.","url":"https://insights.sbomify.com/CVE-2026-21865/"}