{"id":"CVE-2026-59990","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-59990","generatedAt":"2026-10-28T09:27:28.421Z","title":"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.","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.","published":"2026-09-23T19:17:33.000Z","lastModified":"2026-09-30T17:32:07.000Z","status":"Deferred","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-770"],"affected":[],"epss":{"score":0.00615,"percentile":0.49245,"date":"2026-10-27","history":[{"date":"2026-09-24","score":0.00623,"percentile":0.47573}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.61%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"new","label":"New CVE","at":"2026-09-23T19:17:33.000Z","detail":{"score":"7.5","severity":"HIGH","publishedAt":"2026-09-23T19:17:32.637Z"},"summary":"New CVE, high severity (CVSS 7.5)."}],"references":[{"url":"https://github.com/typelevel/jawn/commit/191cb3a44e77f1afab439ee636bf66bdf3c54a04","source":"security-advisories@github.com"},{"url":"https://github.com/typelevel/jawn/commit/6219666641f9408498f85868f835e17bd8a72fed","source":"security-advisories@github.com"},{"url":"https://github.com/typelevel/jawn/commit/93ac93e9c992c11b4c03d5455d8551f9fb24da1b","source":"security-advisories@github.com"},{"url":"https://github.com/typelevel/jawn/commit/f6ace7e0db715de1a8c4618bed9378333a5c2214","source":"security-advisories@github.com"},{"url":"https://github.com/typelevel/jawn/releases/tag/v1.7.0","source":"security-advisories@github.com"},{"url":"https://github.com/typelevel/jawn/security/advisories/GHSA-cc4v-rvgp-2pf3","source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-59990","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}