CVE-2026-41244CWE-208

Mojic: Observable Timing Discrepancy in HMAC Verification

Medium · published April 24, 2026

CVSS v3.1
4.7
EPSS
0%
Percentile
4.0
In the wild
Unconfirmed
What it is

Mojic is a CLI tool to transform readable C code into an unrecognizable chaotic stream of emojis. Prior to 2.1.4, the CipherEngine uses a standard equality operator (!==) to verify the HMAC-SHA256 integrity seal during the decryption phase. This creates an Observable Timing Discrepancy (CWE-208), allowing a potential attacker to bypass the file integrity check via a timing attack. This vulnerability is fixed in 2.1.4.

The record
Technical detail
CVSS v3.1
4.7 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00152 · 4.0th percentile
Weakness
CWE-208 · Observable Timing Discrepancy
Published
2026-04-24T19:11Z
EPSS history
Timeline
  • 24 APR 19:11Z
    Mojic: Observable Timing Discrepancy in HMAC Verification
    cvelistv5