{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-40541 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-40541 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-40541 is a critical cross-site scripting vulnerability in Synology Chat Server, published on 28 Aug 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-40541 and fix it if it is affected.\n\nWhat it is: CVE-2026-40541 is a critical cross-site scripting vulnerability in Synology Chat Server, published on 28 Aug 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-40541 in the wild and no public exploit code.\n\nAffected product: Synology Chat Server. 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-2026-40541/ (Markdown: https://insights.sbomify.com/CVE-2026-40541/index.md)","id":"CVE-2026-40541","markdown":"https://insights.sbomify.com/CVE-2026-40541/index.md","name":"CVE-2026-40541","record":{"aliases":["GHSA-gjqh-xg93-f8cw"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["data_read","data_modify","denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Synology Chat Server","requires_auth":"low_privilege","summary":"Authenticated users can exploit XSS in Synology Chat Server to read/write files and cause denial of service in DSM.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"synology","cpe":[],"cvss":{"score":9,"severity":"critical","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"An improper neutralization of input during web page generation ('Cross-site Scripting') vulnerability in extract domain in Synology Chat Server before 2.4.5-22148 allows remote authenticated users, via a UI interaction, to read or write arbitrary files and conduct denial-of-service attacks in DSM.","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":"Cross-site scripting in Synology Chat Server","id":"CVE-2026-40541","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"xss","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Apache HttpClient accepts SCRAM-SHA-256 authentication without proper mutual authentication verification","id":"CVE-2026-40542"},"packages":[],"prev":{"headline":"Security feature bypass in DiskStation Manager (DSM)","id":"CVE-2026-40539"},"products":["Synology Chat Server"],"published":"2026-08-28","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":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-08-28","vendors":["Synology"]},"summary":"Authenticated users can exploit XSS in Synology Chat Server to read/write files and cause denial of service in DSM.","url":"https://insights.sbomify.com/CVE-2026-40541/"}