Security readout for executives and security teams
Plain-English summary
This issue can let specially encoded JSON sent to older Flask applications cause unexpected memory use, potentially denying service. The source bundle identifies Flask before version 1.0 as affected and version 1.0 as fixed. No source provided confirms active exploitation.
Executive priority
Treat this as a targeted maintenance and availability risk, not a confirmed emergency. Prioritize internet-facing or business-critical Flask services still running pre-1.0 versions, then validate upgrades through normal regression testing.
Technical view
CVE-2019-1010083 describes a Flask denial-of-service condition triggered by crafted encoded JSON data causing unexpected memory usage. The affected product is The Pallets Project Flask before 1.0, with the fix listed as version 1.0. The CVE notes possible overlap with CVE-2018-1000656.
Likely exposure
Exposure is most likely in applications using Flask versions before 1.0, especially routes or APIs that accept untrusted JSON input. The bundle does not identify affected configurations beyond Flask version and crafted encoded JSON handling.
Exploitation context
The bundle lists the attack vector as crafted encoded JSON data and the impact as denial of service. CISA KEV status is false, and no cited source in the bundle confirms exploitation in the wild.
Researcher notes
Public detail is limited: no CVSS, CWE, detailed root cause, or exploit status is provided in the bundle. Analysis should stay constrained to Flask pre-1.0, crafted encoded JSON input, memory growth, and denial-of-service impact.
Mitigation direction
- Identify all deployed Flask versions in application dependencies.
- Upgrade Flask to version 1.0 or later where applicable.
- Review Pallets release notes and project guidance before deployment.
- Apply operational memory and request controls as defense in depth.
Validation and detection
- Check dependency manifests and runtime packages for Flask versions below 1.0.
- Map public and internal endpoints that parse untrusted JSON.
- Confirm upgraded environments resolve Flask to version 1.0 or later.
- Review monitoring for memory spikes tied to JSON request handling.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2019-1010083 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://www.palletsprojects.com/blog/flask-1-0-released/CVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.