CVE-2026-29063: Immutable Js Iterate Unguarded Key Assignment Prototype Pollution
Iteration callback writes `$OBJ[$K] = $V` to a plain object without filtering prototype-polluting keys (e.g. '__proto__', 'constructor'). When the iterated collection's keys are attacker-controlled (e.g. an Immutable.Map built from `fromJS(JSON.parse(input))`), this triggers the prototype setter and pollutes the returned object's prototype (CVE-2026-29063, C
JSgreprules fetch cve-2026-29063-immutable-js-iterate-unguarded-key-assignment-prototype-pollution --engine opengrepDescription
Iteration callback writes `$OBJ[$K] = $V` to a plain object without filtering prototype-polluting keys (e.g. '__proto__', 'constructor'). When the iterated collection's keys are attacker-controlled (e.g. an Immutable.Map built from `fromJS(JSON.parse(input))`), this triggers the prototype setter and pollutes the returned object's prototype (CVE-2026-29063, C
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.