How severe is CVE-2022-3433?

CVE-2022-3433 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2022-3433 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-3433?

CVE-2022-3433 affects Haskell Aeson. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-3433?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2022-3433 published?

CVE-2022-3433 was published on 2022-10-10 and last updated on 2026-06-17.

CVE-2022-3433

CVE-2022-3433 is a medium-severity vulnerability in Haskell Aeson with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-326.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 1% (49th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-326
Affected product: Haskell Aeson
Published: 2022-10-10
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2022-3433?: 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.
How severe is CVE-2022-3433?: CVE-2022-3433 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2022-3433 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-3433?: CVE-2022-3433 affects Haskell Aeson. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-3433?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2022-3433 published?: CVE-2022-3433 was published on 2022-10-10 and last updated on 2026-06-17.

References

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

Affected products (1)

cpe:2.3:a:haskell:aeson:*:*:*:*:*:*:*:*

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