CVE-2026-61814— Jawn: Quadratic parsing effort in AsyncParser
Quick assessment
Affected
typelevel jawn
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
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 control
Affected Version Matrix 4
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| org.typelevel | jawn-parser_2.12 | < 1.7.0 |
affected |
| org.typelevel | jawn-parser_2.13 | < 1.7.0 |
affected |
| org.typelevel | jawn-parser_3 | < 1.7.0 |
affected |
| typelevel | jawn | < 1.7.0 |
affected |
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I. Basic Information for CVE-2026-61814
Vulnerability Information
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Vulnerability Title
Jawn: Quadratic parsing effort in AsyncParser
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| typelevel | jawn | < 1.7.0 | - |
|
| org.typelevel | jawn-parser_2.12 | < 1.7.0 | - |
|
| org.typelevel | jawn-parser_2.13 | < 1.7.0 | - |
|
| org.typelevel | jawn-parser_3 | < 1.7.0 | - |
|
II. Public POCs for CVE-2026-61814
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2026-61814 (3)
-
https://github.com/typelevel/jawn/releases/tag/v1.7.0 x_refsource_MISC
-
https://github.com/typelevel/jawn/security/advisories/GHSA-w4cm-gvhj-cgw6 x_refsource_CONFIRM
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V. Comments for CVE-2026-61814
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