What’s Vulnerable › Vulnerabilities

CVE-2022-3433

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2022-10-10 · updated 2026-06-17
• Weakness: CWE-328

Description

The aeson library is not safe to use to consume untrusted JSON input. A remote user could abuse this flaw to produce a hash collision in the underlying unordered-containers library by sending specially crafted JSON data, resulting in a denial of service.

Affected products

• aeson: before 2.0.1.0 — fixed in 2.0.1.0

How to fix

Upgrade to a fixed version: aeson 2.0.1.0. Check the vendor advisory for mitigations.

References

• https://cs-syd.eu/posts/2021-09-11-json-vulnerability
• https://cs-syd.eu/posts/2021-09-11-json-vulnerability

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