What is CVE-2026-61814?

CVE-2026-61814 is a high-severity vulnerability in Org.typelevel Jawn-Parser 2.12, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2026-09-23.

How severe is CVE-2026-61814?

High severity. CVSS v3 base score is 7.5 out of 10.

Resource exhaustion in Org.typelevel Jawn-Parser 2.12

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.

Vulnerability class: DoS (Denial of Service)

Published 2026-09-23 · last modified 2026-09-23.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Org.typelevel Jawn-Parser 2.12 — versions < 1.7.0
Org.typelevel Jawn-Parser 2.13 — versions < 1.7.0
Org.typelevel Jawn-Parser 3 — versions < 1.7.0
Typelevel Jawn — versions < 1.7.0

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-61814?: CVE-2026-61814 is a high-severity vulnerability in Org.typelevel Jawn-Parser 2.12, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2026-09-23.
How severe is CVE-2026-61814?: High severity. CVSS v3 base score is 7.5 out of 10.