CVE-2026-59990 Jawn - Denial of Service

Jawn < 1.7.0 contains a denial of service caused by lack of depth limit in JSON parsing, letting remote attackers exhaust JVM heap via deeply nested JSON, exploit requires submission of untrusted JSON.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.62% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Denial of Service
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
23 September 2026
Updated
15 October 2026
Weakness
CWE-770

Vendor fix

Upgrade to version 1.7.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

← All CVEs