CVE-2026-41851: CWE-770: Allocation of Resources Without Limits or Throttling in Spring Spring Framework
Applications which accept user-supplied Spring Expression Language (SpEL) expressions may be vulnerable to a Denial of Service (DoS) attack if the evaluation of a SpEL expression triggers unbounded cache growth. Affected versions: Spring Framework 7.0.0 through 7.0.7; 6.2.0 through 6.2.18; 6.1.0 through 6.1.27; 5.3.0 through 5.3.48.
AI Analysis
Technical Summary
CVE-2026-41851 is a medium severity vulnerability in the Spring Framework where applications that accept user-supplied Spring Expression Language (SpEL) expressions may be vulnerable to denial of service (DoS) attacks. The vulnerability arises because evaluation of certain SpEL expressions can cause unbounded growth of internal caches, leading to resource exhaustion. This affects Spring Framework versions 7.0.0 through 7.0.7, 6.2.0 through 6.2.18, 6.1.0 through 6.1.27, and 5.3.0 through 5.3.48. No official patch or remediation level has been provided yet, and no known exploits are reported in the wild.
Potential Impact
The vulnerability can cause denial of service by exhausting system resources through unbounded cache growth when processing malicious SpEL expressions. This impacts the availability of applications using affected Spring Framework versions. There is no impact on confidentiality or integrity reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, avoid accepting or evaluating untrusted user-supplied SpEL expressions to mitigate risk.
CVE-2026-41851: CWE-770: Allocation of Resources Without Limits or Throttling in Spring Spring Framework
Description
Applications which accept user-supplied Spring Expression Language (SpEL) expressions may be vulnerable to a Denial of Service (DoS) attack if the evaluation of a SpEL expression triggers unbounded cache growth. Affected versions: Spring Framework 7.0.0 through 7.0.7; 6.2.0 through 6.2.18; 6.1.0 through 6.1.27; 5.3.0 through 5.3.48.
CVSS v3.1
Score 5.3medium
Affected software
pkg:maven/org.springframework/spring-frameworkRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-41851 is a medium severity vulnerability in the Spring Framework where applications that accept user-supplied Spring Expression Language (SpEL) expressions may be vulnerable to denial of service (DoS) attacks. The vulnerability arises because evaluation of certain SpEL expressions can cause unbounded growth of internal caches, leading to resource exhaustion. This affects Spring Framework versions 7.0.0 through 7.0.7, 6.2.0 through 6.2.18, 6.1.0 through 6.1.27, and 5.3.0 through 5.3.48. No official patch or remediation level has been provided yet, and no known exploits are reported in the wild.
Potential Impact
The vulnerability can cause denial of service by exhausting system resources through unbounded cache growth when processing malicious SpEL expressions. This impacts the availability of applications using affected Spring Framework versions. There is no impact on confidentiality or integrity reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, avoid accepting or evaluating untrusted user-supplied SpEL expressions to mitigate risk.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- vmware
- Date Reserved
- 2026-04-22T06:22:08.200Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a279b32e29bf47b503575d3
Added to database: 06/09/2026, 04:48:50 UTC
Last enriched: 06/28/2026, 21:03:27 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 54
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