AIKIDO-2026-10015
bcrypt is vulnerable to Observable Timing Discrepancy
28
Low Risk
This Affects:
bcryptTL;DR
Affected versions of this package are vulnerable to Timing Attacks due to a non-constant time string comparison in the == method for password hash verification (the original code used super, which is typically a regular equality check). An attacker could exploit this by analyzing the time taken to compare a guessed secret against the stored hash to infer information about the hash and potentially brute-force the password more efficiently. The patched code implements a constant-time comparison by iterating through each byte and using a bitwise OR operation, ensuring the comparison time does not depend on the input.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range.
Background info
bcrypt is vulnerable to Observable Timing Discrepancy in versions 3.1.0 - 3.1.20.
How to fix this
Upgrade the bcrypt library to the patch version.
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SOC 2Compliant
ISO 27001Compliant