Vulnerability 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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/typelevel/jawn/commit/191cb3a44e77f1afab439ee636bf66bdf3c54a0
- https://github.com/typelevel/jawn/commit/6219666641f9408498f85868f835e17bd8a72fe
- https://github.com/typelevel/jawn/commit/93ac93e9c992c11b4c03d5455d8551f9fb24da1
- https://github.com/typelevel/jawn/commit/f6ace7e0db715de1a8c4618bed9378333a5c221
- https://github.com/typelevel/jawn/releases/tag/v1.7.0
- https://github.com/typelevel/jawn/security/advisories/GHSA-cc4v-rvgp-2pf3
FAQ
What is CVE-2026-59990?
CVE-2026-59990 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 ...
How severe is CVE-2026-59990?
CVE-2026-59990 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-59990?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.