{"id":"CVE-2026-34151","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-34151","generatedAt":"2026-10-28T01:46:54.741Z","title":"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.","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.","published":"2026-09-14T18:17:47.000Z","lastModified":"2026-09-30T19:57:08.000Z","status":"Deferred","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"4.0","score":8.2,"severity":"HIGH","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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-24"],"affected":[],"epss":{"score":0.01062,"percentile":0.64368,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (1.06%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://github.com/xwiki/xwiki-commons/pull/1675","source":"security-advisories@github.com"},{"url":"https://github.com/xwiki/xwiki-platform/commit/79eba8655f3a96021a8e7ad07956e48d20a82383","source":"security-advisories@github.com"},{"url":"https://github.com/xwiki/xwiki-platform/commit/f7b33704083d3b4e45d1b9fc1e2cc33c66855f85","source":"security-advisories@github.com"},{"url":"https://github.com/xwiki/xwiki-platform/releases/tag/xwiki-platform-17.10.5","source":"security-advisories@github.com"},{"url":"https://github.com/xwiki/xwiki-platform/releases/tag/xwiki-platform-18.2.0","source":"security-advisories@github.com"},{"url":"https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-qj4x-9g63-25g6","source":"security-advisories@github.com"},{"url":"https://jira.xwiki.org/browse/XCOMMONS-3594","source":"security-advisories@github.com"},{"url":"https://jira.xwiki.org/browse/XWIKI-24075","source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-34151","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}