CVE-2026-78654: Prototype Pollution Reflect Has Deep Merge
Detected `Reflect.has` used inside a recursive object merge function. `Reflect.has` traverses the prototype chain, which allows special keys like `__proto__` to be recognized as existing properties and traversed recursively, leading to Prototype Pollution. Use `Object.hasOwn()` and reject keys such as `__proto__`, `constructor`, and `prototype`.
TSgreprules fetch cve-2026-78654-prototype-pollution-reflect-has-deep-merge --engine opengrepDescription
Detected `Reflect.has` used inside a recursive object merge function. `Reflect.has` traverses the prototype chain, which allows special keys like `__proto__` to be recognized as existing properties and traversed recursively, leading to Prototype Pollution. Use `Object.hasOwn()` and reject keys such as `__proto__`, `constructor`, and `prototype`.
Community feedback
0 rule-level signals from signed-in users.
- Useful reports
- 0
- Context false positives
- 0
- Metadata suggestions
- 0
Contextual precision
Aggregated from approved scan feedback. False-positive reports describe observed scan contexts, not a global rule verdict.
- Findings observed
- 0
- Projects
- 0
- Reporters
- 0
Precision details are collecting more signed-in reports before verdict counts or ratios are emphasized.
No approved finding verdicts yet.
No scan diagnostics reported yet.