6.5

CVSS Score

3.1

-

CVSS Score

Basic Information

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CVE-2022-22950

CVE-2022-22950: Allocation of Resources Without Limits or Throttling in Spring Framework

In Spring Framework versions 5.3.0 - 5.3.16, 5.2.0.RELEASE - 5.2.19.RELEASE, and older unsupported versions, it is possible for a user to provide a specially crafted SpEL expression that may cause a denial of service condition.

(GitHub Advisory)

Miggo Vulnerability Database

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CVE-2022-22950

CVE-2022-22950:

6.5

CVSS Score

3.1

-

CVSS Score

Basic Information

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Technical Details

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
org.springframework:spring-expression	maven	>= 5.3.0, < 5.3.17	5.3.17
org.springframework:spring-expression	maven	< 5.2.20.RELEASE	5.2.20.RELEASE

Technical Details

Vulnerability Intelligence
Miggo AI

Root Cause Analysis

The vulnerability stems from missing array size validation in SpEL's array creation logic. The patch introduced a MAX_ARRAY_ELEMENTS threshold (256K elements) and added checkNumElements() validation in createArray(). The vulnerable versions lacked these checks, allowing attackers to specify arbitrary array sizes in SpEL expressions. The commit diff shows critical additions: 1) MAX_ARRAY_ELEMENTS constant, 2) checkNumElements() calls during array size calculation, and 3) proper error handling via SpelMessage.MAX_ARRAY_ELEMENTS_THRESHOLD_EXCEEDED. The createArray method is directly responsible for processing array constructors in SpEL expressions, making it the clear entry point for this resource exhaustion vulnerability.

Vulnerable functions

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WAF Protection Rules

WAF Rule

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Reasoning

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