Resource exhaustion in Spring Framework - CVE-2026-47886
Published: August 28, 2026
Vulnerability identifier: #VU146218
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-47886
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to uncontrolled resource consumption in Spring Expression Language (SpEL) expression evaluation when processing user-supplied expressions that use the power operator with a BigDecimal or BigInteger operand and a large exponent value. A remote attacker can submit a specially crafted expression to cause a denial of service.
Exploitation requires that the application accept and evaluate untrusted SpEL expressions and that a BigDecimal or BigInteger value be accessible within the evaluation context.
Affected software
Spring Framework
Library Support for Spring
Library Support for Spring
How to mitigate CVE-2026-47886
Install security update from vendor's website.
Spring Framework - addressed in versions 5.2.26, 5.3.50, 6.0.31, 6.1.29, 6.2.20, 7.0.8.1, 7.0.9
Library Support for Spring - update to 3.5.19
Library Support for Spring - update to 3.5.19