Intel

AIKIDO-2026-10072

grammy is vulnerable to Timing Attacks

Timing Attacks Pre-CVE
Found by Aikido Intel before public disclosure or CVE publication.

45

Medium Risk

This Affects:

JSgrammy
1.9.0 - 1.39.2
Fixed in 1.39.3

TL;DR

Affected versions of this package are vulnerable to timing attacks due to non-constant-time string comparison when validating secret tokens, which can allow an attacker to infer secret token information through timing differences; the issue is fixed by replacing the vulnerable logic with a constant-time, byte-by-byte comparison that always iterates tokenBytes.length times, prevents timing-based information leakage, and correctly handles undefined and edge cases.

Who does this affect?

You are affected if you are using a version that falls within the vulnerable range.

Background info

grammy is vulnerable to Timing Attacks in versions 1.9.0 - 1.39.2.

How to fix this

Upgrade the grammy library to the patch version.