CVE-2026-61814
Jawn: Quadratic parsing effort in AsyncParser
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-400 CWE-407 |
| Vendor | typelevel |
| Product | jawn |
| Published | Sep 23, 2026 |
| Last Updated | Sep 23, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
typelevel / jawn
< 1.7.0
org.typelevel / jawn-parser_2.12
< 1.7.0
org.typelevel / jawn-parser_2.13
< 1.7.0
org.typelevel / jawn-parser_3
< 1.7.0