{"id":"CVE-2026-33013","summary":"Micronaut vulnerable to DoS via crafted form-urlencoded body binding with descending array indices","details":"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.","aliases":["GHSA-43w5-mmxv-cpvh"],"modified":"2026-09-04T14:15:53.464429Z","published":"2026-03-20T04:47:42.768Z","database_specific":{"cwe_ids":["CWE-835"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33013.json","unresolved_ranges":[{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"4.0.0-M1"},{"fixed":"4.10.16"},{"fixed":"3.10.5"}]}],"cna_assigner":"GitHub_M"},"references":[{"type":"WEB","url":"https://github.com/micronaut-projects/micronaut-core/releases/tag/v3.10.5"},{"type":"WEB","url":"https://github.com/micronaut-projects/micronaut-core/releases/tag/v4.10.16"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33013.json"},{"type":"ADVISORY","url":"https://github.com/micronaut-projects/micronaut-core/security/advisories/GHSA-43w5-mmxv-cpvh"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33013"},{"type":"FIX","url":"https://github.com/micronaut-projects/micronaut-core/commit/1afe509677c51b320041b7a2c177366d4a4deb55"},{"type":"FIX","url":"https://github.com/micronaut-projects/micronaut-core/pull/12410"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/micronaut-projects/micronaut-core","events":[{"introduced":"0"},{"fixed":"1afe509677c51b320041b7a2c177366d4a4deb55"},{"fixed":"df467a445d6bc1951261f8176d16e2fdb7664a73"},{"fixed":"ce658f16c2aee3b1ceddcc50d0e10bdcbb9177ff"}],"database_specific":{"source":"REFERENCES"}}],"versions":["v4.10.15","v4.10.14","v4.10.13","v4.10.12","v4.10.11","v4.10.10","v4.10.9","v4.10.8","v4.10.7","v4.10.6","v4.10.5","v4.10.4","v4.10.3","v4.10.2","v4.10.1","v4.10.0","v4.7.0","v4.5.3","v4.6.1","v4.6.0","v4.5.2","v4.5.1","v4.5.0","v4.4.1","v4.4.0","v3.10.4","v4.3.4","v4.3.3","v4.3.2","v4.3.1","v4.3.0","v3.10.3","v3.10.2","v3.10.1","v4.1.0","v3.10.0","v4.0.0-RC1","v4.0.0-M7","v4.0.0-M6","v4.0.0-M5","v4.0.0-M4","v4.0.0-M3","v3.9.0","v4.0.0-M2","v4.0.0-M1","v3.8.0","v3.7.0","v3.6.0","v3.5.0","v3.4.0","v3.3.0-M1","v3.2.0","v3.1.0","v3.0.0","v3.0.0-RC1","v3.0.0-M5","v3.0.0-M4","v3.0.0-M2","v2.0.1","v2.0.0","v2.0.0.RC2","v2.0.0.RC1","v1.3.0","v1.3.0.RC1","v1.3.0.M2","v1.3.0.TEST","v1.3.0.M1","v1.2.0","v1.2.0.RC2","v1.2.0.RC1","v1.1.0.RC2","v1.1.0.RC1","v1.1.0.M2","v1.1.0.M1","v1.0.0","v1.0.0.RC3","v1.0.0.RC2","v1.0.0.M4","v1.0.0.M3","v1.0.0.M2","v1.0.0.M1"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-33013.json","vanir_signatures_modified":"2026-09-04T14:15:53Z","vanir_signatures":[{"target":{"file":"json-core/src/main/java/io/micronaut/json/bind/JsonBeanPropertyBinder.java","function":"expandArrayToThreshold"},"deprecated":false,"digest":{"function_hash":"175787426874796037149300206937472283218","length":193},"id":"CVE-2026-33013-2bf12c96","signature_type":"Function","signature_version":"v1","source":"https://github.com/micronaut-projects/micronaut-core/commit/1afe509677c51b320041b7a2c177366d4a4deb55"},{"deprecated":false,"digest":{"line_hashes":["306987661067287766752771307883587773615","32240720018508785938857598548342130902","236615021491175958906561369559329351149","70992822853841178140569168864530495963"],"threshold":0.9},"id":"CVE-2026-33013-c8e99990","signature_type":"Line","signature_version":"v1","source":"https://github.com/micronaut-projects/micronaut-core/commit/1afe509677c51b320041b7a2c177366d4a4deb55","target":{"file":"json-core/src/main/java/io/micronaut/json/bind/JsonBeanPropertyBinder.java"}}]}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"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"}]}