{"id":"CVE-2026-59990","state":"PUBLISHED","title":"Jawn: Uncontrolled nesting depth in JSON parser","description":"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.","publishedAt":"2026-09-23T18:41:12.073Z","updatedAt":"2026-09-23T19:27:58.498Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["typelevel jawn"],"affected":[{"vendor":"typelevel","product":"jawn","versions":[{"version":"< 1.7.0","status":"affected"}]}],"references":["https://github.com/typelevel/jawn/security/advisories/GHSA-cc4v-rvgp-2pf3","https://github.com/typelevel/jawn/commit/191cb3a44e77f1afab439ee636bf66bdf3c54a04","https://github.com/typelevel/jawn/commit/6219666641f9408498f85868f835e17bd8a72fed","https://github.com/typelevel/jawn/commit/93ac93e9c992c11b4c03d5455d8551f9fb24da1b","https://github.com/typelevel/jawn/commit/f6ace7e0db715de1a8c4618bed9378333a5c2214","https://github.com/typelevel/jawn/releases/tag/v1.7.0"],"weaknesses":["CWE-770"],"ingestedAt":"2026-10-29T20:12:32.778Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/59xxx/CVE-2026-59990.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-59990","state":"PUBLISHED","datePublished":"2026-09-23T18:41:12.073Z","dateUpdated":"2026-09-23T19:27:58.498Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-07-07T19:41:00.005Z"},"containers":{"cna":{"title":"Jawn: Uncontrolled nesting depth in JSON parser","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"typelevel","product":"jawn","versions":[{"version":"< 1.7.0","status":"affected"}]}],"references":[{"url":"https://github.com/typelevel/jawn/security/advisories/GHSA-cc4v-rvgp-2pf3","name":"https://github.com/typelevel/jawn/security/advisories/GHSA-cc4v-rvgp-2pf3","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/typelevel/jawn/commit/191cb3a44e77f1afab439ee636bf66bdf3c54a04","name":"https://github.com/typelevel/jawn/commit/191cb3a44e77f1afab439ee636bf66bdf3c54a04","tags":["x_refsource_MISC"]},{"url":"https://github.com/typelevel/jawn/commit/6219666641f9408498f85868f835e17bd8a72fed","name":"https://github.com/typelevel/jawn/commit/6219666641f9408498f85868f835e17bd8a72fed","tags":["x_refsource_MISC"]},{"url":"https://github.com/typelevel/jawn/commit/93ac93e9c992c11b4c03d5455d8551f9fb24da1b","name":"https://github.com/typelevel/jawn/commit/93ac93e9c992c11b4c03d5455d8551f9fb24da1b","tags":["x_refsource_MISC"]},{"url":"https://github.com/typelevel/jawn/commit/f6ace7e0db715de1a8c4618bed9378333a5c2214","name":"https://github.com/typelevel/jawn/commit/f6ace7e0db715de1a8c4618bed9378333a5c2214","tags":["x_refsource_MISC"]},{"url":"https://github.com/typelevel/jawn/releases/tag/v1.7.0","name":"https://github.com/typelevel/jawn/releases/tag/v1.7.0","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-770","lang":"en","description":"CWE-770: Allocation of Resources Without Limits or Throttling","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-09-23T18:41:12.073Z"},"source":{"advisory":"GHSA-cc4v-rvgp-2pf3","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-23T19:27:50.740766Z","id":"CVE-2026-59990","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-23T19:27:58.498Z"}}]}}}