CVE-2026-61814
High
Description
Jawn is an open source JSON parser. Prior to 1.7.0, Jawn's AsyncParser can perform quadratic work when a single JSON token is delivered across many small chunks because each absorb call rescans the incomplete token from the start. A remote attacker who controls untrusted JSON input and its chunk sizes can exhaust CPU resources and cause denial of service in applications using AsyncParser. This issue is fixed in version 1.7.0.
SeverityHigh
CVSS7.5
Exploit probability—
ProductOrg.typelevel:jawn-parser
PublishedSep 23, 2026
First seenSep 23, 2026
How to fix
Update
- org.typelevel:jawn-parser_2.121.7.0 or later
- org.typelevel:jawn-parser_2.131.7.0 or later
- org.typelevel:jawn-parser_31.7.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| org.typelevel:jawn-parser_2.12Maven | v < 1.7.0 | 1.7.0 |
| org.typelevel:jawn-parser_2.13Maven | v < 1.7.0 | 1.7.0 |
| org.typelevel:jawn-parser_3Maven | v < 1.7.0 | 1.7.0 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.