CVE-2026-55091

flat-to-nested converts a hierarchy from a flat representation to a nested representation. Prior to 1.1.2, FlatToNested.prototype.convert in index.js uses attacker-influenced id and parent record fields directly as keys in the plain temp and pendingChildOf objects. When parent or id is proto,...

CVE-2026-55091 flat-to-nested: Prototype pollution in flat-to-nested convert() via __proto__ parent/id key

flat-to-nested converts a hierarchy from a flat representation to a nested representation. Prior to 1.1.2, FlatToNested.prototype.convert in index.js uses attacker-influenced id and parent record fields directly as keys in the plain temp and pendingChildOf objects. When parent or id is proto,...

EUVD-2026-77691

flat-to-nested converts a hierarchy from a flat representation to a nested representation. Prior to 1.1.2, FlatToNested.prototype.convert in index.js uses attacker-influenced id and parent record fields directly as keys in the plain temp and pendingChildOf objects. When parent or id is proto,...

CVE-2026-55091

flat-to-nested (NPM, versions ≥1.1.0, ≤1.1.1) is vulnerable to prototype pollution (CWE-1321) in FlatToNested.prototype.convert (index.js). The function uses attacker-controlled id and parent field values directly as keys in plain objects, so a value of "__proto__" resolves via the prototype chai...

CVE-2026-55091 flat-to-nested: Prototype pollution in flat-to-nested convert() via __proto__ parent/id key

flat-to-nested converts a hierarchy from a flat representation to a nested representation. Prior to 1.1.2, FlatToNested.prototype.convert in index.js uses attacker-influenced id and parent record fields directly as keys in the plain temp and pendingChildOf objects. When parent or id is proto,...

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

Summary convert builds the nested tree by using each flat record's id and parent field values directly as object keys, with no guard against proto / constructor / prototype. A record whose parent is the string "proto" makes tempparent resolve to Object.prototype, and the following initPush...

@chaibuilder/sdk (>=0.1.0, <=1.2.19), @coderrental/csp-categorytree (>=1.1.0, <=1.1.7) +2 more potentially affected by CVE-2026-55091 via flat-to-nested (>=1.1.0, <=1.1.1)

flat-to-nested NPM version =1.1.0, =0.1.0, =1.1.0, =1.0.17, =1.0.18 - flow-dg-category-module 0.0.0 Source cves: CVE-2026-55091 Source advisory: SNYK:JS-FLATTONESTED-17817904...

@chaibuilder/sdk (>=0.1.0, <=1.2.19), @coderrental/csp-categorytree (>=1.1.0, <=1.1.7) +2 more potentially affected by CVE-2026-55091 via flat-to-nested (>=1.1.0, <=1.1.1)

flat-to-nested NPM version =1.1.0, =0.1.0, =1.1.0, =1.0.17, =1.0.18 - flow-dg-category-module 0.0.0 Source cves: CVE-2026-55091 Source advisory: OSV:GHSA-HP36-V28F-W3R4...

GHSA-HP36-V28F-W3R4 flat-to-nested: Prototype pollution in flat-to-nested convert() via __proto__ parent/id key

Summary convert builds the nested tree by using each flat record's id and parent field values directly as object keys, with no guard against proto / constructor / prototype. A record whose parent is the string "proto" makes tempparent resolve to Object.prototype, and the following initPush...

PT-2026-51094

Summary convert builds the nested tree by using each flat record's id and parent field values directly as object keys, with no guard against proto / constructor / prototype. A record whose parent is the string " proto " makes tempparent resolve to Object.prototype, and the following initPush...