{"answers":{"affected":"","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-18430 exists.","fix":"No fix has been published for CVE-2026-18430 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-18430 is a high-severity cross-site scripting vulnerability in HumHub, published on 19 Aug 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-18430 and fix it if it is affected.\n\nWhat it is: CVE-2026-18430 is a high-severity cross-site scripting vulnerability in HumHub, published on 19 Aug 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-18430 exists.\n\nAffected product: HumHub. 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-2026-18430/ (Markdown: https://insights.sbomify.com/CVE-2026-18430/index.md)","id":"CVE-2026-18430","markdown":"https://insights.sbomify.com/CVE-2026-18430/index.md","name":"CVE-2026-18430","record":{"aliases":[],"analysis":{"component_type":"web_application","fix_type":"patch","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"HumHub social platform","requires_auth":"high_privilege","summary":"A space administrator can inject malicious scripts via the comment deletion reason, leading to stored XSS in notifications.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Fluid Attacks","cpe":[],"cvss":{"score":7.2,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:P/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N","version":"4.0"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"HumHub 1.18.4 contains a stored cross-site scripting vulnerability in the comment-deletion notification flow. A Space administrator can delete another user's comment, choose to notify the original author, and place HTML/JavaScript in the deletion reason.","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":"HumHub 1.18.4 - Stored XSS in comment-deletion notifications through unescaped administrator reason","id":"CVE-2026-18430","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"xss","year":"2026"},"n_packages":0,"n_references":3,"next":{"headline":"Avada \u003c= 7.16 and Fusion Builder \u003c= 3.16 - Unauthenticated Remote Code Execution via Arbitrary File Write","id":"CVE-2026-18431"},"packages":[],"prev":{"headline":"SQL Query Validation Bypass in OpenSearch Direct Query","id":"CVE-2026-18428"},"products":["HumHub"],"published":"2026-08-19","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":"total"},"state":"PUBLISHED","updated":"2026-08-19","vendors":["HumHub"]},"summary":"A space administrator can inject malicious scripts via the comment deletion reason, leading to stored XSS in notifications.","url":"https://insights.sbomify.com/CVE-2026-18430/"}