{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-39935 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-39935 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-39935 is a medium-severity cross-site scripting vulnerability in The Wikimedia Foundation Mediawiki - CampaignEvents Extension, published on 7 Apr 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-2026-39935 and fix it if it is affected.\n\nWhat it is: CVE-2026-39935 is a medium-severity cross-site scripting vulnerability in The Wikimedia Foundation Mediawiki - CampaignEvents Extension, published on 7 Apr 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-2026-39935 in the wild and no public exploit code.\n\nAffected product: The Wikimedia Foundation Mediawiki - CampaignEvents Extension. 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-2026-39935/ (Markdown: https://insights.sbomify.com/CVE-2026-39935/index.md)","id":"CVE-2026-39935","markdown":"https://insights.sbomify.com/CVE-2026-39935/index.md","name":"CVE-2026-39935","record":{"aliases":["GHSA-g2mp-vfg6-8xwm"],"analysis":{"component_type":"cms_plugin","fix_type":"patch","impacts":["code_execution","account_takeover"],"network_reachable":"yes","non_default_config":false,"product_category":"MediaWiki CampaignEvents Extension","requires_auth":"none","summary":"Cross-site scripting vulnerability in MediaWiki CampaignEvents Extension allows attackers to inject malicious scripts via localized wiki names.","user_interaction":"not_required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"wikimedia-foundation","cpe":[],"cvss":{"score":6.9,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L","version":"4.0"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in The Wikimedia Foundation Mediawiki - CampaignEvents Extension allows Cross-Site Scripting (XSS). This issue was remediated only on the `master` branch.","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":"XSS-via-i18n in localised wiki names","id":"CVE-2026-39935","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"xss","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"Stored XSS in Score due to usage of non-reserved data attributes","id":"CVE-2026-39936"},"packages":[],"prev":{"headline":"Growth Experiments ReassignMenteesJob runs as an infinite loop","id":"CVE-2026-39934"},"products":["Mediawiki - CampaignEvents Extension"],"published":"2026-04-07","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":"partial"},"state":"PUBLISHED","updated":"2026-04-08","vendors":["The Wikimedia Foundation"]},"summary":"Cross-site scripting vulnerability in MediaWiki CampaignEvents Extension allows attackers to inject malicious scripts via localized wiki names.","url":"https://insights.sbomify.com/CVE-2026-39935/"}