npm-check-updates 23.0.2 Terminal Injection via Unsanitized Escape Sequences (CVE-2026-73035) | HOL Guard CVE

Medium · CVSS 4.3CVE-2026-73035

npm-check-updates 23.0.2 Terminal Injection via Unsanitized Escape Sequences

Answer in brief

CVE-2026-73035 records a Medium severity (CVSS 4.3) vulnerability in npm-check-updates 23.0.2 Terminal Injection via Unsanitized Escape Sequences. The current sources do not mark it as known exploited. The current feed maps raineorshine/npm-check-updates (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 10, 2026Updated Aug 11, 2026Source checked Sep 25, 2026First seen by HOL Aug 10, 2026Material review Aug 11, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 4.3
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

CVSS is 4.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps raineorshine/npm-check-updates (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
raineorshine/npm-check-updatesgeneric	0	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for raineorshine/npm-check-updates.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Aug 10, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 11, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 10, 2026

Sources and claim methodology

Upstream source description

npm-check-updates through 23.0.2, fixed in commit b554b84, contains a terminal escape sequence injection vulnerability that allows an attacker to embed arbitrary terminal control characters in a dependency's package.json homepage or repository URL fields. When a developer runs ncu with the --format homepage or --format repo option, unfiltered escape sequences are written directly to the terminal, enabling malicious output manipulation or other terminal-dependent effects.

Quoted source text, attributed separately from HOL analysis.