typography-0.5.10.tgz: 1 vulnerabilities (highest severity is: 5.9) #455

Vulnerable Library - typography-0.5.10.tgz

Sample Path to Dependency File: /playground/package.json

Path to vulnerable library: /playground/package.json

CVE-2026-104844

Vulnerable Library - postcss-selector-parser-6.0.10.tgz

> Selector parser with built in methods for working with selector strings.

Library home page: https://registry.npmjs.org/postcss-selector-parser/-/postcss-selector-parser-6.0.10.tgz

Sample Path to Dependency File: /playground/package.json

Path to vulnerable library: /playground/package.json

Dependency Hierarchy:

• typography-0.5.10.tgz (Root Library)
  • ❌ postcss-selector-parser-6.0.10.tgz (Vulnerable Library)

Found in base branch: develop

Vulnerability Details

PostCSS Selector Parser is a CSS selector parser that integrates with PostCSS but does not require it. Prior to 7.1.6, src/parser.js splitWord() can receive a flat selector as one word token carrying many class or ID indexes because period and hash characters are not tokenizer word delimiters. The uniqs() deduplication and per-index class and ID membership checks repeatedly scan the class and ID index arrays, while a separate Sass-interpolation filtering pass also performs repeated linear scanning. Together, these passes make parsing quadratic in the number of indexes and allow a crafted selector to occupy a synchronous parser thread. The maxNestingDepth guard does not mitigate the issue because the hostile selector can have zero nesting depth. Only consumers that synchronously parse untrusted selectors in an exposed request path are affected; ordinary build-time parsing of trusted sources is not affected. This issue is fixed in version 7.1.6.

Publish Date: 2026-10-02

URL: CVE-2026-104844

CVSS 3 Score Details (5.9)

Base Score Metrics:

• Exploitability Metrics:
  • Attack Vector: Network
  • Attack Complexity: High
  • Privileges Required: None
  • User Interaction: None
  • Scope: Unchanged
• Impact Metrics:
  • Confidentiality Impact: None
  • Integrity Impact: None
  • Availability Impact: High

Suggested Fix

Type: Upgrade version

Origin: GHSA-rj75-hqrm-r3gf

Release Date: 2026-10-02

Fix Resolution: postcss-selector-parser - 7.1.6

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