Bug 2524864 (CVE-2026-47886)

Summary: CVE-2026-47886 Spring Framework: org.springframework/spring-expression: Spring Framework: Denial of Service via unbounded exponentiation in SpEL expressions
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: abrianik, fmongiar, ggrzybek, gmalinko, gtanzill, janstey, jbuscemi, jnethert, jraez, parichar, pdelbell, rstepani, sdawley, tasato
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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A flaw was found in Spring Framework. Applications that process user-supplied Spring Expression Language (SpEL) expressions are vulnerable to a Denial of Service (DoS) attack. This occurs when the power operator (^) is used with large numerical operands, leading to excessive resource consumption. A remote attacker could exploit this to make the application unresponsive.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-08-27 06:23:05 UTC 
Applications that evaluate user-supplied Spring Expression Language (SpEL) expressions may be vulnerable to a Denial of Service (DoS) attack when the power operator (^) is used with a BigDecimal or BigInteger operand and a large exponent value.
Spring Framework 7.0.0 - 7.0.8
Spring Framework 6.2.0 - 6.2.19
Spring Framework 6.1.0 - 6.1.28
Spring Framework 6.0.0 - 6.0.30
Spring Framework 5.3.0 - 5.3.49
Spring Framework 5.2.25.RELEASE and earlier