CVE-2026-113730
mediumOGNL is an Object Graph Navigation Library for Java.
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.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/orphan-oss/ognl/commit/16396fa4b560221294c2ab9ca04b76b161115e7d security-advisories@github.com
- https://github.com/orphan-oss/ognl/commit/f4c17f794754d516ea799c36ed8524d1b7fb98e2 security-advisories@github.com
- https://github.com/orphan-oss/ognl/releases/tag/OGNL_3_4_13 security-advisories@github.com
- https://github.com/orphan-oss/ognl/security/advisories/GHSA-crwc-vw2r-qr6m security-advisories@github.com