The aeson library is not safe to use to consume untrusted JSON input
Published Oct 10, 2022
6.5
MEDIUMCVSS 3.1
EPSS 0.77%
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
- Vendor n/a Product Aeson Defaultn/a
- Version Fixed in 2.0.1.0StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| n/a | Aeson | n/a |
|
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 4, 2026.
Score over time
2022-2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (10 key points)
Flat stretches are collapsed. Showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 4, 2026 | 0.77% (0.00766) | 53.93th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.71% (0.00710) | 48.52th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.11% (0.00115) | 27.74th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.14% (0.00139) | 51.06th | v3 (v2023.03.01) |
| May 2, 2024 | 0.14% (0.00139) | 48.94th | v3 (v2023.03.01) |
| Oct 17, 2023 | 0.13% (0.00130) | 47.52th | v3 (v2023.03.01) |
| Sep 10, 2023 | 0.08% (0.00083) | 34.27th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.07% (0.00072) | 29.32th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.05% (0.01055) | 52.13th | v2 (v2022.01.01) |
| Oct 11, 2022 | 1.05% (0.01055) | 50.64th | v2 (v2022.01.01) |
References (1)
- https://cs-syd.eu/posts/2021-09-11-json-vulnerability ExploitPatchTechnical DescriptionThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| https://cs-syd.eu/posts/2021-09-11-json-vulnerability | ExploitPatchTechnical DescriptionThird Party Advisory |
Change history (0)
No recorded changes yet.