Pallets Project Flask is vulnerable to Denial of Service via Unexpected memory usage
The Pallets Project Flask before 1.0 is affected by unexpected memory usage. The impact is denial of service. The attack vector is crafted encoded JSON data. The fixed version is 1. NOTE this may overlap CVE-2018-1000656.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | flask | < 1.0 | 1.0 |
References
- https://www.palletsprojects.com/blog/flask-1-0-released/
- https://github.com/advisories/GHSA-5wv5-4vpf-pj6m
- https://nvd.nist.gov/vuln/detail/CVE-2019-1010083
- https://github.com/pallets/flask
- https://github.com/pypa/advisory-database/tree/main/vulns/flask/PYSEC-2019-179.yaml
- https://www.palletsprojects.com/blog/flask-1-0-released
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H- Weakness (CWE)
CWE-400- Platform
- Python (PyPI)
- Package
flask- Disclosed
- 17.07.2019
- Updated
- 11.10.2026 11:20
Sources and licenses
OSV / GitHub Advisory Database - PYSEC-2019-179 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-5wv5-4vpf-pj6m - CC BY 4.0
Vulnerability history: flask
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 5
- First → latest
- 08.2018 02.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 3
- Low 2
Disclosures per year
- 2018: 1
- 2019: 1
- 2020: 0
- 2021: 0
- 2022: 0
- 2023: 1
- 2024: 0
- 2025: 1
- 2026: 1
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Pallets Project Flask is vulnerable to Denial of Service via Unexpected memory usage this entry
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