{"id":"CVE-2026-59990","summary":"Jawn: Uncontrolled nesting depth in JSON parser","details":"Jawn is an open source JSON parser. Prior to 1.7.0, Jawn parse methods accept arbitrarily deep JSON array and object nesting without a depth limit, allowing a remote attacker who can submit untrusted JSON to grow parser contexts until the JVM heap is exhausted. The resulting java.lang.OutOfMemoryError is a fatal Scala error that is not ordinarily handled by scala.util.Try or cats.effect.IO, causing denial of service. This issue is fixed in version 1.7.0.","aliases":["GHSA-cc4v-rvgp-2pf3"],"modified":"2026-09-24T11:30:14.271717443Z","published":"2026-09-23T18:41:12.073Z","database_specific":{"cwe_ids":["CWE-770"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/59xxx/CVE-2026-59990.json","cna_assigner":"GitHub_M"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/59xxx/CVE-2026-59990.json"},{"type":"FIX","url":"https://github.com/typelevel/jawn/commit/191cb3a44e77f1afab439ee636bf66bdf3c54a04"},{"type":"FIX","url":"https://github.com/typelevel/jawn/commit/6219666641f9408498f85868f835e17bd8a72fed"},{"type":"FIX","url":"https://github.com/typelevel/jawn/commit/93ac93e9c992c11b4c03d5455d8551f9fb24da1b"},{"type":"FIX","url":"https://github.com/typelevel/jawn/commit/f6ace7e0db715de1a8c4618bed9378333a5c2214"},{"type":"WEB","url":"https://github.com/typelevel/jawn/releases/tag/v1.7.0"},{"type":"ADVISORY","url":"https://github.com/typelevel/jawn/security/advisories/GHSA-cc4v-rvgp-2pf3"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-59990"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/typelevel/jawn","events":[{"introduced":"0"},{"fixed":"29dfc7e761e1430b18a7e813ee37b73e2908ab64"}],"database_specific":{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"0"},{"fixed":"1.7.0"}]}}],"versions":["v1.6.0","v1.5.1","v1.5.0","v1.4.0","v1.3.2","v1.3.0","v1.2.0","v1.1.2","v1.1.1","v1.1.0","v1.0.3","v1.0.2","v1.0.1","v1.0.0","v1.0.0-RC4","v1.0.0-RC3","v1.0.0-RC2","v1.0.0-RC1","v0.14.2","v0.14.1","v0.14.0","v0.13.0","v0.12.2","v0.12.1","v0.12.0","v0.11.1","v0.11.0","v0.10.4","v0.10.2","v0.10.1","v0.10.0","v0.9.0","v0.8.4","v0.8.3","v0.8.2","v0.8.1","v0.8.0","v0.7.4","v0.7.2","v0.7.1","v0.7.0","v0.6.0","v0.5.5","v0.5.4","v0.5.3","v0.5.1","v0.5.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-59990.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}