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WW-5838 Exclude java.beans, java.lang.reflect and java.lang.invoke from OGNL member access by default - #2112
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lukaszlenart merged 1 commit intoNov 5, 2026
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…g.invoke from OGNL member access SecurityMemberAccess compares the declaring class and the target class of each member an expression resolves against the exclusion lists. java.beans.Expression and java.beans.Statement perform the call they describe inside the JDK, so the inner call is never presented as a member and neither the excluded-class nor the static-method check sees it. On this line the exclusion lists are the only layer unless the application enables struts.allowlist.enable, so the package exclusion closes that path. java.lang.reflect and java.lang.invoke are reachable from an expression only through a static call or a Class object, both already rejected, and are excluded in the same pass. An application that needs one of these classes in an expression can re-allow it with struts.excludedPackageExemptClasses. StrutsExcludedClassesTest pins the shipped lists with the allowlist disabled: member access on Expression, Statement, Method and MethodHandle is denied, the dev-mode list agrees, and an Expression constructed inside an OGNL expression is rejected at its constructor. Co-Authored-By: Claude Mythos 5.1 <noreply@anthropic.com>
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November 5, 2026 14:24
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Fixes WW-5838
6.x counterpart of the
mainPR.SecurityMemberAccesscompares the declaring class and the target class of each member an OGNL expression resolves againststruts.excludedClassesandstruts.excludedPackageNames. The shipped lists did not namejava.beans.java.beans.Expressionandjava.beans.Statementperform the call they describe inside the JDK, so the inner call is never presented as a member and neither the excluded-class check nor the static-method check sees it. On this line the exclusion lists are the only layer unless the application enablesstruts.allowlist.enable, so the package exclusion closes that path.java.lang.reflectandjava.lang.invokeare reachable from an expression only through a static call or aClassobject, both already rejected, and are excluded in the same pass. The package rule also coversjava.beans.beancontext. An application that needs expression access to a class in one of these packages can re-allow it withstruts.excludedPackageExemptClasses.Changes
struts-excluded-classes.xml: the three packages added tostruts.excludedPackageNamesandstruts.devMode.excludedPackageNamesStrutsExcludedClassesTest: loads the shipped file with the allowlist disabled and pins that member access onExpression,Statement,MethodandMethodHandleis denied (declaring-class and target-class branches), that the dev-mode list carries the same entries (production list overridden to a single entry so only the dev-mode list can deny), that thestruts.excludedPackageNamessetting replaces the shipped list, and that anExpressionconstructed inside an OGNL expression is rejected at its constructor. All six tests fail without the XML change.Full
coretest suite: 2745 tests, 0 failures.Reported by Yu Deshui (于得水, @qiushui_sky) and by Daniel Owens.
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