CVE-2026-61814
highJawn is an open source JSON parser.
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
7.5
7.5 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Severity source: NVD CVSS v3.1 (security-advisories@github.com)
Timeline (UTC)
Published: 2026-09-23 19:17
Modified: 2026-09-30 17:32
NVD status: Deferred
Last synced 2 days ago
Verified against the source API 2026-10-27 06:55 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/typelevel/jawn/commit/cddcd5e3387c356b05953f7b2af103d309687e4b security-advisories@github.com
- https://github.com/typelevel/jawn/releases/tag/v1.7.0 security-advisories@github.com
- https://github.com/typelevel/jawn/security/advisories/GHSA-w4cm-gvhj-cgw6 security-advisories@github.com
Data sources
NVD CVE API 2.0 — fetched 2026-10-27 06:55 UTC · record ↗