CVE-2026-59990
High · 7.5CVSS
7.5
EPSS
0.6%
Published
Sep 23, 2026
CISA due date
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The record
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 packages
| Ecosystem | Package | Introduced | Fixed |
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