Allocation of Resources Without Limits or Throttling Affecting org.springframework:spring-expression package, versions [,7.0.9)
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- published26 Aug 2026
- disclosed20 Aug 2026
- creditUnknown
Introduced: 20 Aug 2026
NewCVE-2026-59283 (opens in a new tab)How to fix?
Upgrade org.springframework:spring-expression to version 7.0.9 or higher.
Overview
Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling in the SimpleEvaluationContext file when the SpEL expression compiler is enabled through specific configuration settings. An attacker can cause unbounded class-loading growth and bypass enforced safety checks by submitting specially crafted expressions for evaluation.
Note: This is only exploitable if the application evaluates SpEL expressions using SimpleEvaluationContext and the SpEL expression compiler is active via the spring.expression.compiler.mode property or a SpelParserConfiguration set to IMMEDIATE or MIXED.