CVE-2026-61814High· 7.5▾ TwilightJawn 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 remo…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 41.3 · likelihood 0.2 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Sep 25.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.6%
Last analysed / modified upstream
0.6% → 0.8%
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.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Affected packages:
org.typelevel:jawn-parser_2.12 <= 1.6.0org.typelevel:jawn-parser_2.13 <= 1.6.0org.typelevel:jawn-parser_3 <= 1.6.0Patched in:
org.typelevel:jawn-parser_2.12 1.7.0org.typelevel:jawn-parser_2.13 1.7.0org.typelevel:jawn-parser_3 1.7.0Connected by shared product, vendor, weakness, or advisory.
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