Vulnerability · Published Aug 10, 2026 · Assigned by VulnCheck

CVE-2026-73035npm-check-updates 23.0.2 Terminal Injection via Unsanitized Escape Sequences

Medium 4.3

In plain English

A medium-severity security flaw in npm-check-updates from raineorshine. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 31% of all known vulnerabilities).

Severity (CVSS 3.1)4.3Medium

Exploit odds (30 days)0.4%top 68.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
raineorshine	npm-check-updates	0 – through 23.0.2

Weakness: CWE-150 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

References

Researcher Disclosure technical-description
Pull Request issue-tracking
Patch Commit patch
https://www.vulncheck.com/advisories/npm-check-updates-terminal-injection-via-unsanitized-escape-sequences third-party-advisory