Security readout for executives and security teams
Plain-English summary
CVE-2019-19507 is a validation bypass in the npm package jpv before 2.1.1. If an application uses this library to decide whether JSON input is acceptable, crafted input may trick the validator about data type. Business impact depends on what the application trusts after validation.
Executive priority
Treat as a targeted dependency-risk item, not an internet-wide emergency based on available evidence. Prioritize systems where jpv validates customer, partner, webhook, or API JSON before sensitive business logic.
Technical view
jpv, also called Json Pattern Validator, has a compareCommon() weakness before 2.1.1. Certain conflicting attribute names can overwrite internal attributes used for type detection. This affects validate(), allowing crafted JSON to manipulate validation results. No CVSS score, CWE, or CPE details are provided in the bundle.
Likely exposure
Exposure is likely limited to JavaScript or Node.js applications that depend on jpv before 2.1.1 and validate untrusted JSON. The source bundle does not provide CPEs or a broader affected-product matrix.
Exploitation context
The source bundle does not show KEV listing or active exploitation evidence. Exploitation would require an attacker-controlled JSON payload reaching a vulnerable validate() code path. Impact depends on downstream trust decisions made after validation succeeds.
Researcher notes
The useful research question is blast radius: where validate() gates security-sensitive behavior. The public description supports a type-detection manipulation issue, but does not establish remote exploitability, active exploitation, CVSS severity, or application-level impact.
Mitigation direction
- Inventory applications and lockfiles for jpv dependency usage.
- Upgrade jpv to 2.1.1 or later where applicable.
- Review vendor GitHub and npm guidance before rollout.
- Avoid relying on affected validation paths for security decisions until upgraded.
- Add defense-in-depth checks for security-critical JSON fields.
Validation and detection
- Confirm installed jpv versions in package manifests and lockfiles.
- Trace whether validate() processes untrusted or external JSON.
- Review tests covering conflicting JSON attribute names.
- Verify production builds no longer include jpv before 2.1.1.
- Assess what authorization or data-flow decisions depend on validation success.
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-2019-19507 mapping review
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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://github.com/manvel-khnkoyan/jpv/issues/6CVE reference · x_refsource_MISC
- https://www.npmjs.com/package/jpvCVE reference · x_refsource_MISC
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.