CVE-2026-61814

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/typelevel/jawn/commit/cddcd5e3387c356b05953f7b2af103d309687e4b
https://github.com/typelevel/jawn/releases/tag/v1.7.0
https://github.com/typelevel/jawn/security/advisories/GHSA-w4cm-gvhj-cgw6

Configurations

No configuration.

History

23 Sep 2026, 19:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-23 19:17

Updated : 2026-09-30 17:32

NVD link : CVE-2026-61814

Mitre link : CVE-2026-61814

CVE.ORG link : CVE-2026-61814

JSON object : View

Products Affected

No product.

CWE

CWE-400

Uncontrolled Resource Consumption

CWE-407

Inefficient Algorithmic Complexity

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