CVE-2026-41244 json
Mojic: Observable Timing Discrepancy in HMAC Verification
published 2026-04-16 6 mo ago modified 2026-10-26 13 d ago also GHSA-wqq3-wfmp-v85g , EUVD-2026-25610
- cvss
- 4.7
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.1%
- EPSS 0.1% chance of exploitation in 30 days, percentile 1%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- npm mojic 2.1.4
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 6 mo ago
Exploit prediction
0.11% chance of exploitation in the next 30 days, higher than 1% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/notamitgamer/mojic/security/advisories/GHSA-wqq3-wfmp-v85g referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 4.7 | CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N |
| GitHub | 3.1 | 4.7 | CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | mojic | <2.1.4 |
2.1.4 |
Affected products
- notamitgamer mojic
Classification
- Weakness
-
- CWE-208 Observable Timing Discrepancy
References
Sources
- CVE List CVE-2026-41244
- GitHub Advisory GHSA-wqq3-wfmp-v85g
- NVD CVE-2026-41244
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