CVE-2026-63376 toml-node: Prototype Pollution Leads to `Object.prototype` Corruption via `__proto__` Key-Path Desynchronization

toml-node is a TOML parser for Node.js and the browser. Prior to 4.1.2, toml.parse in lib/compiler.js can be tricked by a table path such as a.b.y.proto.proto, allowing traversal from a scalar value into Number.prototype and Object.prototype. The currentPath tracking value uses both arrays and...

CVE-2026-63376

toml-node , a TOML parser for Node.js and the browser, is affected by a prototype pollution vulnerability in toml.parse() (lib/compiler.js) prior to version 4.1.2. The root cause is a key-path desynchronization : currentPath tracking uses both arrays and strings, so valueAssignments records a com...

CVE-2026-63376 toml-node: Prototype Pollution Leads to `Object.prototype` Corruption via `__proto__` Key-Path Desynchronization

toml-node is a TOML parser for Node.js and the browser. Prior to 4.1.2, toml.parse in lib/compiler.js can be tricked by a table path such as a.b.y.proto.proto, allowing traversal from a scalar value into Number.prototype and Object.prototype. The currentPath tracking value uses both arrays and...

CVE-2026-50029

js-toml is a TOML parser for JavaScript, Prior to version 1.1.2, the interpreter checks whether a key already exists in a parser-built container with if objectkey instead of if key in object. When the prior value is a falsy primitive — false, 0, 0n, 0.0, -0, or "" — the duplicate-key branch is...

CVE-2026-50029 js-toml has silent type confusion via falsy-primitive duplicate-key bypass

js-toml is a TOML parser for JavaScript, Prior to version 1.1.2, the interpreter checks whether a key already exists in a parser-built container with if objectkey instead of if key in object. When the prior value is a falsy primitive — false, 0, 0n, 0.0, -0, or "" — the duplicate-key branch is...

CVE-2026-50029 js-toml has silent type confusion via falsy-primitive duplicate-key bypass

js-toml is a TOML parser for JavaScript, Prior to version 1.1.2, the interpreter checks whether a key already exists in a parser-built container with if objectkey instead of if key in object. When the prior value is a falsy primitive — false, 0, 0n, 0.0, -0, or "" — the duplicate-key branch is...

CVE-2026-50029: Incorrect Comparison

js-toml is a TOML parser for JavaScript, Prior to version 1.1.2, the interpreter checks whether a key already exists in a parser-built container with if objectkey instead of if key in object. When the prior value is a falsy primitive — false, 0, 0n, 0.0, -0, or "" — the duplicate-key branch is...

Incorrect Comparison

Overview js-toml is an A TOML parser for JavaScript/TypeScript, targeting TOML 1.0.0 Spec Affected versions of this package are vulnerable to Incorrect Comparison via the load process. An attacker can manipulate configuration values by supplying specially crafted TOML input that uses duplicate ke...

NPM: js-toml has silent type confusion via falsy-primitive duplicate-key bypass

NPM: js-toml has silent type confusion via falsy-primitive duplicate-key bypass vulnerability discovered by ? in WordPress Npm js-toml versions = 1.1.1...

GHSA-M34P-749J-X6M6 js-toml has silent type confusion via falsy-primitive duplicate-key bypass

Summary js-toml's interpreter checks whether a key already exists in a parser-built container with if objectkey instead of if key in object. When the prior value is a falsy primitive — false, 0, 0n, 0.0, -0, or "" — the duplicate-key branch is skipped and the value is silently overwritten by a...

EUVD-2026-38060

js-toml vulnerable to CPU exhaustion via On^2 BigInt construction on radix-prefixed integer literals...

PT-2026-53025

Name of the Vulnerable Software and Affected Versions js-toml versions prior to 1.1.2 Description The interpreter incorrectly verifies if a key already exists in a parser-built container by using if objectkey instead of if key in object. When a key is assigned a falsy primitive value—such as fals...

CVE-2026-49293

js-toml is a TOML parser for JavaScript, fully compliant with the TOML 1.0.0 Spec. Versions up to and including 1.1.0 parse hexadecimal / octal / binary integer literals via a hand-written parseBigInt loop that multiplies a BigInt accumulator by the radix once per input digit. Each iteration...

CVE-2026-49293 CPU exhaustion via O(n^2) BigInt construction on radix-prefixed integer literals

js-toml is a TOML parser for JavaScript, fully compliant with the TOML 1.0.0 Spec. Versions up to and including 1.1.0 parse hexadecimal / octal / binary integer literals via a hand-written parseBigInt loop that multiplies a BigInt accumulator by the radix once per input digit. Each iteration...

PT-2026-51007

Name of the Vulnerable Software and Affected Versions js-toml versions prior to 1.1.1 Description The software contains a quadratic time complexity issue during the parsing of hexadecimal, octal, and binary integer literals. This occurs because the parseBigInt function uses a loop that performs a...

TOML parser Prototype Pollution

The vulnerability of the TOML parser relates to uncontrolled changes to object prototype attributes. Exploiting this vulnerability could allow a remote attacker to execute a “prototype pollution” attack...

[SECURITY] Fedora 44 Update: python-tomli-2.4.1-1.fc44

Tomli is a Python library for parsing TOML. Tomli is fully compatible with TOML v1.0.0...

@actinc/eslint-config (>=4.10.0, <=4.16.0), @alexgorbatchev/dotfiles (>=0.0.1, <=1.0.4) +330 more potentially affected by unknown CVE via smol-toml (>=1.1.2, <=1.6.0)

smol-toml NPM version =1.1.2, =4.10.0, =0.0.1, =2.8.0, =0.1.0-alpha.0, =0.1.3, =0.1.3, =0.1.3, =0.2.2, =0.32.3, =0.2.2, =1.0.0, =1.0.4, =0.2.0, =0.0.4, =9.0.0-canary.1784 and more Source cves: unknown CVE Source advisory: OSV:GHSA-V3RJ-XJV7-4JMQ...

Prototype Pollution

Overview js-toml is an A TOML parser for JavaScript/TypeScript, targeting TOML 1.0.0 Spec Affected versions of this package are vulnerable to Prototype Pollution via the parsing process. An attacker can inject or modify properties on the global Object.prototype by supplying specially crafted TOML...

CVE-2025-54803

js-toml is a TOML parser for JavaScript, fully compliant with the TOML 1.0.0 Spec. In versions below 1.0.2, a prototype pollution vulnerability in js-toml allows a remote attacker to add or modify properties of the global Object.prototype by parsing a maliciously crafted TOML input. This is fixed...