flat-to-nested: Prototype pollution in flat-to-nested convert() via __proto__ parent/id key

These records connect through source-stated identifiers. Shared identifiers or dates alone do not establish shared exposure, root cause or applicability.

CVE-2026-55091 · Microsoft / collected KEV context

EUVD-2026-77691

GHSA-hp36-v28f-w3r4

cve-program · CVE-2026-55091

• https://github.com/joaonuno/flat-to-nested-js/security/advisories/GHSA-hp36-v28f-w3r4
• https://github.com/joaonuno/flat-to-nested-js/commit/680a5ebe1194edda16fa93baaa56ff14fe0e3d7f
• https://github.com/joaonuno/flat-to-nested-js/releases/tag/v1.1.2

euvd · EUVD-2026-77691

• https://github.com/joaonuno/flat-to-nested-js/security/advisories/GHSA-hp36-v28f-w3r4
• https://github.com/joaonuno/flat-to-nested-js/commit/680a5ebe1194edda16fa93baaa56ff14fe0e3d7f
• https://github.com/joaonuno/flat-to-nested-js/releases/tag/v1.1.2

nvd · CVE-2026-55091

• https://github.com/joaonuno/flat-to-nested-js/commit/680a5ebe1194edda16fa93baaa56ff14fe0e3d7f
• https://github.com/joaonuno/flat-to-nested-js/releases/tag/v1.1.2
• https://github.com/joaonuno/flat-to-nested-js/security/advisories/GHSA-hp36-v28f-w3r4

osv · GHSA-hp36-v28f-w3r4

• https://github.com/joaonuno/flat-to-nested-js/security/advisories/GHSA-hp36-v28f-w3r4
• https://github.com/joaonuno/flat-to-nested-js/commit/680a5ebe1194edda16fa93baaa56ff14fe0e3d7f
• https://github.com/joaonuno/flat-to-nested-js

No related operational record is retained in the current change model.