CVE-2026-33013
Micronaut vulnerable to DoS via crafted form-urlencoded body binding with descending array indices
- State
- Published
- Severity
- 8.2 High
- Published
- Mar 20, 2026
- Updated
- Mar 25, 2026
- Reserved
- Mar 17, 2026
Description
Micronaut Framework is a JVM-based full stack Java framework designed for building modular, easily testable JVM applications. Versions prior to both 4.10.16 and 3.10.5 do not correctly handle descending array index order during form-urlencoded body binding in theJsonBeanPropertyBinder::expandArrayToThreshold, which allows remote attackers to cause a DoS (non-terminating loop, CPU exhaustion, and OutOfMemoryError) via crafted indexed form parameters (e.g., authors[1].name followed by authors[0].name). This issue has been fixed in versions 4.10.16 and 3.10.5.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.2 High | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N | GitHub_M |
Weaknesses
- CWE-835 Loop with Unreachable Exit Condition ('Infinite Loop')
Affected Products
| Product | Versions |
|---|---|
micronaut-coremicronaut-projects |
|
References
- https://github.com/micronaut-projects/micronaut-core/security/advisories/GHSA-43w5-mmxv-cpvh
- https://github.com/micronaut-projects/micronaut-core/pull/12410
- https://github.com/micronaut-projects/micronaut-core/commit/1afe509677c51b320041b7a2c177366d4a4deb55
- https://github.com/micronaut-projects/micronaut-core/releases/tag/v3.10.5
- https://github.com/micronaut-projects/micronaut-core/releases/tag/v4.10.16
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