{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-74864 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-74864 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-74864 is a critical authentication bypass vulnerability in YunoHost-Apps sogo_yhn, published on 30 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-2026-74864 and fix it if it is affected.\n\nWhat it is: CVE-2026-74864 is a critical authentication bypass vulnerability in YunoHost-Apps sogo_yhn, published on 30 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-2026-74864 in the wild and no public exploit code.\n\nAffected product: YunoHost-Apps sogo_yhn. 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-2026-74864/ (Markdown: https://insights.sbomify.com/CVE-2026-74864/index.md)","id":"CVE-2026-74864","markdown":"https://insights.sbomify.com/CVE-2026-74864/index.md","name":"CVE-2026-74864","record":{"aliases":["GHSA-fxx9-8vhm-fwhc"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["account_takeover","privilege_escalation"],"network_reachable":"yes","non_default_config":false,"product_category":"SOGo YunoHost app","requires_auth":"none","summary":"Attackers can bypass authentication by injecting a specific HTTP header, gaining unauthorized access to any user account, including privileged ones.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"CERT-PL","cpe":[],"cvss":{"score":9.3,"severity":"critical","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-639","name":"Authorization Bypass Through User-Controlled Key"}],"description":"sogo_yhn configures SOGo with a parameter that forces the request with HTTP header \"x-webobjects-remote-user\" to be treated as sent by a verified user without performing password validation. Since Nginx does not strip this header, any client can supply it arbitrarily and gain access as any user, including a privileged user, without providing a password.\n\nThis issue was fixed in version 5.8.0~ynh9.","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":"Authentication Bypass in sogo_yhn","id":"CVE-2026-74864","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"auth_bypass","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"Authentication Bypass in sogo_yhn","id":"CVE-2026-74865"},"packages":[],"prev":{"headline":"Libxml2: double-free/uaf in libxml2 python bindings","id":"CVE-2026-74860"},"products":["sogo_yhn"],"published":"2026-09-30","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":"total"},"state":"PUBLISHED","updated":"2026-09-30","vendors":["YunoHost-Apps"]},"summary":"Attackers can bypass authentication by injecting a specific HTTP header, gaining unauthorized access to any user account, including privileged ones.","url":"https://insights.sbomify.com/CVE-2026-74864/"}