DescriptionThe NPM package `micromatch` is vulnerable to Regular Expression Denial of Service (ReDoS). The vulnerability occurs in `micromatch.braces()` in `index.js` because the pattern `.*` will greedily match anything. By passing a malicious payload, the pattern matching will keep backtracking to the input while it doesn't find the closing bracket. As the input size increases, the consumption time will also increase until it causes the application to hang or slow down. There was a merged fix but further testing shows the issue persists. This issue should be mitigated by using a safe pattern that won't start backtracking the regular expression due to greedy matching.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs1071631

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
node-micromatch (PTS)buster2.3.11-1vulnerable
sid, trixie, bookworm4.0.5+~4.0.2-1vulnerable

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs


[bookworm] - node-micromatch <no-dsa> (Minor issue)
[bullseye] - node-micromatch <no-dsa> (Minor issue)
[buster] - node-micromatch <postponed> (Minor issue)

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