{"cve":"CVE-2026-44242","nvd":{"published":"2026-05-12T22:16:35.617","modified":"2026-10-26T14:10:00.130","status":"Deferred","description":"Micronaut Framework is a JVM-based full stack Java framework designed for building modular, easily testable JVM applications. Prior to 4.10.22, the bundleCache is keyed by (Locale, baseName) where the locale originates from the HTTP Accept-Language header. In applications that explicitly register a ResourceBundleMessageSource bean and serve HTML error responses, an unauthenticated attacker can exhaust heap memory by sending requests with large numbers of unique Accept-Language values, each causing a new entry in the unbounded bundleCache. This vulnerability is fixed in 4.10.22.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","score":3.7},"cwes":["CWE-400"],"references":["https://github.com/micronaut-projects/micronaut-core/security/advisories/GHSA-3rfq-4wpf-qqw3","https://github.com/micronaut-projects/micronaut-core/security/advisories/GHSA-3rfq-4wpf-qqw3"],"products":[],"source":"nvd","synced_at":"2026-10-26T14:27:29.784594657+00:00"},"epss":{"cve":"CVE-2026-44242","score":0.00209,"percentile":0.1101,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-3rfq-4wpf-qqw3","url":"https://osv.dev/vulnerability/GHSA-3rfq-4wpf-qqw3","summary":"Micronaut has Unbounded `bundleCache` in `ResourceBundleMessageSource` that Allows Memory Exhaustion via `Accept-Language` Header","modified":"2026-06-30T20:00:18.283450278Z","packages":[{"ecosystem":"Maven","name":"io.micronaut:micronaut-inject","purl":"pkg:maven/io.micronaut/micronaut-inject","ranges":[">=4.10.0 <4.10.22"],"fixed":["4.10.22"]},{"ecosystem":"Maven","name":"io.micronaut:micronaut-inject","purl":"pkg:maven/io.micronaut/micronaut-inject","ranges":[">=3.10.0 <3.10.6"],"fixed":["3.10.6"]},{"ecosystem":"Maven","name":"io.micronaut:micronaut-inject","purl":"pkg:maven/io.micronaut/micronaut-inject","ranges":["<3.8.14"],"fixed":["3.8.14"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}