Home/CWE/Inefficient Regular Expression Complexity
Weakness

Inefficient Regular Expression Complexity

CWE-1333 · Base · Draft

The product uses a regular expression with a worst-case computational complexity that is inefficient and possibly exponential.

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Weakness Relationships

Where this weakness sits in the CWE hierarchy. Walk up to broader classes or down to more specific variants.
Parent of this (broader)
ChildOfCWE-407 · Inefficient Algorithmic Complexity
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Attack Patterns (CAPEC)

1
How adversaries exploit this weakness, per MITRE CAPEC.
CAPEC-492Regular Expression Exponential Blowup
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CVEs With This Weakness

546
A sample of the 546 CVEs tagged with this weakness.
CVECVE-2026-8159
CVECVE-2026-5986
CVECVE-2026-4926
CVECVE-2026-4923
CVECVE-2026-4867
CVECVE-2026-4539
CVECVE-2026-44425
CVECVE-2026-41040
CVECVE-2026-40319
CVECVE-2026-39320
CVECVE-2026-35611
CVECVE-2026-35458
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