{"answers":{"affected":"","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-8406 exists.","fix":"No fix has been published for CVE-2026-8406 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-8406 is a high-severity missing authorization vulnerability in OS4ED openSIS-Classic, published on 11 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-8406 and fix it if it is affected.\n\nWhat it is: CVE-2026-8406 is a high-severity missing authorization vulnerability in OS4ED openSIS-Classic, published on 11 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-8406 exists.\n\nAffected product: OS4ED openSIS-Classic. 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-2026-8406/ (Markdown: https://insights.sbomify.com/CVE-2026-8406/index.md)","id":"CVE-2026-8406","markdown":"https://insights.sbomify.com/CVE-2026-8406/index.md","name":"CVE-2026-8406","record":{"aliases":["GHSA-vgf3-fpxc-h968"],"analysis":{"component_type":"web_application","fix_type":"patch","impacts":["data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"openSIS Classic","requires_auth":"low_privilege","summary":"Authenticated users can read other users' sent messages by manipulating the mail_id parameter in the messaging module.","user_interaction":"not_required","vuln_class":"missing_authorization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Fluid Attacks","cpe":[],"cvss":{"score":7.1,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-639","name":"Authorization Bypass Through User-Controlled Key"}],"description":"openSIS Classic 9.3 contains an insecure direct object reference vulnerability in the messaging module. Any authenticated user with access to the messaging module can request sent-message details from modules/messaging/SentMail.php by supplying an arbitrary mail_id value.","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":"openSIS Classic 9.3 - Insecure Direct Object Reference in Sent Mail","id":"CVE-2026-8406","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":"Missing authorization in Server","id":"CVE-2026-8407"},"packages":[],"prev":{"headline":"IBM Guardium Data Protection is affected by Exposure of Sensitive Information vulnerability","id":"CVE-2026-8405"},"products":["openSIS-Classic"],"published":"2026-06-11","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":"no","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-06-11","vendors":["OS4ED"]},"summary":"Authenticated users can read other users' sent messages by manipulating the mail_id parameter in the messaging module.","url":"https://insights.sbomify.com/CVE-2026-8406/"}