CVE-2022-21653

Name: CVE-2022-21653
Creator: NVD / NIST
Published: 2022-01-05T21:15:07.89+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.79%

Last modified Jun 17, 2026

CVE-2022-21653 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Jawn is an open source JSON parser. Extenders of the `org.typelevel.jawn.SimpleFacade` and `org.typelevel.jawn.MutableFacade` who don't override `objectContext()` are vulnerable to a hash collision attack which may result in a denial of service. EPSS estimates a 0.79% chance of exploitation in the next 30 days.

Description

Jawn is an open source JSON parser. Extenders of the `org.typelevel.jawn.SimpleFacade` and `org.typelevel.jawn.MutableFacade` who don't override `objectContext()` are vulnerable to a hash collision attack which may result in a denial of service. Most applications do not implement these traits directly, but inherit from a library. `jawn-parser-1.3.1` fixes this issue and users are advised to upgrade. For users unable to upgrade override `objectContext()` to use a collision-safe collection.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

0.79%

51.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Typelevel	Jawn	< 1.3.2

References

https://github.com/typelevel/jawn/pull/390Exploit, Issue Tracking, Patch, Third Party Advisory
https://github.com/typelevel/jawn/security/advisories/GHSA-vc89-hccf-rq55Patch, Third Party Advisory
https://github.com/typelevel/jawn/pull/390Exploit, Issue Tracking, Patch, Third Party Advisory
https://github.com/typelevel/jawn/security/advisories/GHSA-vc89-hccf-rq55Patch, Third Party Advisory

Timeline

Published: Jan 5, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-21653?

How severe is CVE-2022-21653?

CVE-2022-21653 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.79% probability of exploitation in the next 30 days.

How do I fix CVE-2022-21653?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-21653?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST