{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-100380 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-100380 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-100380 is a medium-severity cross-site scripting vulnerability in Wikimedia Foundation Mediawiki - Wikibase Extension, published on 25 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-100380 and fix it if it is affected.\n\nWhat it is: CVE-2026-100380 is a medium-severity cross-site scripting vulnerability in Wikimedia Foundation Mediawiki - Wikibase Extension, published on 25 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-100380 in the wild and no public exploit code.\n\nAffected product: Wikimedia Foundation Mediawiki - Wikibase 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-2026-100380/ (Markdown: https://insights.sbomify.com/CVE-2026-100380/index.md)","id":"CVE-2026-100380","markdown":"https://insights.sbomify.com/CVE-2026-100380/index.md","name":"CVE-2026-100380","record":{"aliases":["GHSA-x747-q8hh-wvwc"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["code_execution","account_takeover"],"network_reachable":"yes","non_default_config":false,"product_category":"MediaWiki Wikibase extension","requires_auth":"none","summary":"Attackers can execute arbitrary scripts in victims' browsers via reflected XSS in the Wikibase Special:SetLabel language validation field.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"wikimedia-foundation","cpe":[],"cvss":{"score":5.3,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/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":"Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation Mediawiki - Wikibase Extension allows Cross-Site Scripting (XSS).\n\nThis issue affects Mediawiki - Wikibase Extension: from * before 1.46.1, 1.45.5, 1.43.10.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":"2026-09-29","github_poc":1,"max_poc_stars":0,"metasploit":0,"nuclei":0,"refs":[{"date":"2026-09-29T14:28:32Z","kind":"github_poc","ref":"https://github.com/BomboBombone/CVE-2026-100380","stars":0,"title":"Sanitized Wikibase report and patch verification notes for CVE-2026-100380."}],"tier":"poc_unverified"},"has_fix":null,"headline":"Reflected XSS in Wikibase Special:SetLabel language validation","id":"CVE-2026-100380","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"xss","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"UploadWizard Flickr collection and set titles allow DOM XSS","id":"CVE-2026-100381"},"packages":[],"prev":{"headline":"Cross-request disclosure of CentralAuth cookies in Wikipedia Android App","id":"CVE-2026-100379"},"products":["Mediawiki - Wikibase Extension"],"published":"2026-09-25","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)"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-09-26","vendors":["Wikimedia Foundation"]},"summary":"Attackers can execute arbitrary scripts in victims' browsers via reflected XSS in the Wikibase Special:SetLabel language validation field.","url":"https://insights.sbomify.com/CVE-2026-100380/"}