CVE-2026-61814GHSA-W4CM-GVHJ-CGW6
Jawn: Quadratic parsing effort in AsyncParser
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 1.7.0
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
CISA's decision points: whether it is exploited, whether attacks can be automated, and how much control an attacker gets. Assessed (SSVC 2.0.3).What do these mean? →
- Exploitation: none
- Automatable: yes
- Technical impact: partial
Summary
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.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: yes · Technical impact: partial
- Record last updated
Affected versions
- typelevel jawn
fixed in 1.7.0
- org.typelevel jawn-parser_2.12
fixed in 1.7.0
- org.typelevel jawn-parser_2.13
fixed in 1.7.0
- org.typelevel jawn-parser_3
fixed in 1.7.0
- org.typelevel:jawn-parser_2.12Maven
fixed in 1.7.0
- org.typelevel:jawn-parser_2.13Maven
fixed in 1.7.0
- org.typelevel:jawn-parser_3Maven
fixed in 1.7.0