AIKIDO-2026-334325
wcmatch is vulnerable to Denial of Service (DoS)
75
High Risk
This Affects:
wcmatchTL;DR
wcmatch translates extended glob patterns, enabled through the EXTMATCH or EXTGLOB flag, into regular expressions. When it parses patterns containing long chains of unbalanced or improperly nested opening extended-glob brackets, the parser repeatedly discards partially parsed content and restarts validation, producing exponential-time backtracking that worsens with nesting. A short externally influenced pattern of only tens of characters can exhaust CPU and hang the process. The fix reduces nested extended-glob structures and halts parsing once an unclosed extended group is encountered.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range and you enable extended glob matching via the EXTMATCH or EXTGLOB flag and evaluate user-controlled or externally influenced glob patterns.
Background info
wcmatch is vulnerable to Denial of Service (DoS) in versions 0.0.1 - 10.2.1.
How to fix this
Upgrade the wcmatch library to the patch version.
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