{"cve":"CVE-2026-34151","nvd":{"published":"2026-09-14T18:17:47.107","modified":"2026-09-30T19:57:08.043","status":"Deferred","description":"XWiki Platform is a generic wiki platform. Prior to 17.10.5 and 18.2.0, the /skin/ action in com.xpn.xwiki.web.SkinAction can resolve double-encoded parent-directory segments outside the intended skin or web-application resource prefix when Jetty 12 or later decodes the request path. The affected lookup is replaced with Environment.getResourceAsStream(String, String), which constrains a resource to its expected prefix. An unauthenticated remote attacker can use the vulnerable behavior to read arbitrary resources permitted to the Jetty process, including WEB-INF/xwiki.cfg and, depending on deployment depth and operating-system permissions, host files. Tomcat and Jetty versions before 12 do not appear affected. This issue is fixed in versions 17.10.5 and 18.2.0.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","score":8.2},"cvss_v3":null,"cwes":["CWE-24"],"references":["https://github.com/xwiki/xwiki-commons/pull/1675","https://github.com/xwiki/xwiki-platform/commit/79eba8655f3a96021a8e7ad07956e48d20a82383","https://github.com/xwiki/xwiki-platform/commit/f7b33704083d3b4e45d1b9fc1e2cc33c66855f85","https://github.com/xwiki/xwiki-platform/releases/tag/xwiki-platform-17.10.5","https://github.com/xwiki/xwiki-platform/releases/tag/xwiki-platform-18.2.0"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:53:43.293028046+00:00"},"epss":{"cve":"CVE-2026-34151","score":0.01062,"percentile":0.64363,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-qj4x-9g63-25g6","url":"https://osv.dev/vulnerability/GHSA-qj4x-9g63-25g6","summary":"XWiki Platform Old Core: Resource path traversal via /skin/ action endpoint in Jetty 12+","modified":"2026-07-07T13:26:30.500387Z","packages":[{"ecosystem":"Maven","name":"org.xwiki.platform:xwiki-platform-oldcore","purl":"pkg:maven/org.xwiki.platform/xwiki-platform-oldcore","ranges":["<17.10.5"],"fixed":["17.10.5"]},{"ecosystem":"Maven","name":"org.xwiki.platform:xwiki-platform-oldcore","purl":"pkg:maven/org.xwiki.platform/xwiki-platform-oldcore","ranges":[">=18.0.0-rc-1 <18.2.0"],"fixed":["18.2.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}