AIKIDO-2026-10444
deno is vulnerable to Observable Timing Discrepancy
20
Low Risk
This Affects:
denoTL;DR
The Node compatibility AES-GCM decrypt path compared the authentication tag with a plain equality check that can short-circuit on the first differing byte, leaking timing differences to an observer. An attacker who can repeatedly trigger AES-GCM decrypt and measure timing may narrow in on the expected tag. The fix compares the tag using a constant-time comparison so the check does not vary with byte-wise matches.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range.
Background info
deno is vulnerable to Observable Timing Discrepancy in versions 0.0.1 - 2.7.6.
How to fix this
Upgrade the deno library to the patch version.
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SOC 2Compliant
ISO 27001Compliant