{"id":"CVE-2026-113730","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-113730","generatedAt":"2026-10-28T08:11:51.390Z","title":"An attacker-controlled expression can invoke one of these reflection objects as a proxy for a method on a blocked class, causing the real operation to execute inside JDK reflection without passing through the stricter-invocation check again.","description":"OGNL is an Object Graph Navigation Library for Java. Prior to 3.4.13, the optional stricter-invocation mode in OgnlRuntime.invokeMethod checks the declaring class of the method that OGNL invokes but does not block java.lang.reflect.Method, java.lang.reflect.Constructor, or java.lang.reflect.Field. An attacker-controlled expression can invoke one of these reflection objects as a proxy for a method on a blocked class, causing the real operation to execute inside JDK reflection without passing through the stricter-invocation check again. Exploitation requires an application to evaluate untrusted OGNL expressions, use the default or an equivalently permissive MemberAccess that permits reflection, and rely on stricter invocation as a sandbox. Applications using a restrictive MemberAccess, including Apache Struts with SecurityMemberAccess, are not affected by this bypass. This issue is fixed in 3.4.13.","published":"2026-10-20T22:19:30.000Z","lastModified":"2026-10-22T17:29:28.000Z","status":"Awaiting Analysis","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":5.6,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L"},"cwe":["CWE-693"],"affected":[],"epss":{"score":0.00394,"percentile":0.33458,"date":"2026-10-27","history":[{"date":"2026-10-21","score":0.00358,"percentile":0.28278}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.39%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-20T22:19:30.000Z","detail":{"score":"5.6","severity":"MEDIUM","publishedAt":"2026-10-20T22:19:30.043Z"},"summary":"New CVE, medium severity (CVSS 5.6)."}],"references":[{"url":"https://github.com/orphan-oss/ognl/commit/16396fa4b560221294c2ab9ca04b76b161115e7d","source":"security-advisories@github.com"},{"url":"https://github.com/orphan-oss/ognl/commit/f4c17f794754d516ea799c36ed8524d1b7fb98e2","source":"security-advisories@github.com"},{"url":"https://github.com/orphan-oss/ognl/releases/tag/OGNL_3_4_13","source":"security-advisories@github.com"},{"url":"https://github.com/orphan-oss/ognl/security/advisories/GHSA-crwc-vw2r-qr6m","source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-113730","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."}