Uncontrolled resource consumption in Pallets Project Flask
Priority LOW 36CWE-400Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 5 without a fix
Attack profile from CVSS 3.0 · NVD. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-400.
Summary
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.
Why it matters now
EPSS 0.01832 79th percentileScored 2026-11-07
Fix Partial Flask (PyPI): 1.0Red Hat: 5 without a fix
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| The Pallets Project | Flask | ≤ 1.0 [fixed: 1] | — | No fix listed | CNA |
| — | Flask (PyPI) | before 1.0 | 1.0 | Patch available | GHSA-5wv5-4vpf-pj6m |
- Flask VendorThe Pallets Project Affected ≤ 1.0 [fixed: 1] Fixed in — No fix listed CNA
- Flask (PyPI) Vendor— Affected before 1.0 Fixed in 1.0 Patch available GHSA-5wv5-4vpf-pj6m
Remediation
- Fix · GHSA-5wv5-4vpf-pj6m Flask (PyPI) Fixed in 1.0 Advisory →
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Ceph Storage 2 | Affected | No fix planned: Out of support scope |
| Red Hat Ceph Storage 3 | Affected | No fix yet |
| Red Hat Satellite 6 | Affected | No fix planned: Will not fix |
| Red Hat Storage 3 | Affected | No fix planned: Will not fix |
| Red Hat Update Infrastructure 3 for Cloud Providers | Affected | No fix planned: Will not fix |
Not affected: 6 products
- Red Hat Ceph Storage 7
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat OpenShift Container Platform 4
- Red Hat OpenStack Platform 16 (Train)
- Red Hat Quay 3
Timeline
- 2026-10-02 Threatist record created from CVE-2019-1010083
- 2026-10-03 Alias added: GHSA-5wv5-4vpf-pj6m
References
Advisory 3
More pallets Flask vulnerabilities
- TI-2018-16009 The Pallets Project flask version Before 0.12.3 contains a CWE-20: Improper Input… CVSS 3.0HIGH 7.5
- TI-2023-14640 Flask vulnerable to possible disclosure of permanent session cookie due to missing Vary: Cookie header CVSS 3.1HIGH 7.5
- TI-2026-21640 Flask session does not add `Vary: Cookie` header when accessed in some ways CVSS 4.0LOW 2.3
Sources
- CVE-2019-1010083 · CVE Program
- CVE-2019-1010083 · NVD
- FIRST EPSS
- GHSA-5wv5-4vpf-pj6m · GitHub Advisory Database · CC BY 4.0
- CVE-2019-1010083 · Red Hat security data · CC BY 4.0
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