Mojic: Observable Timing Discrepancy in HMAC Verification
Priority MEDIUM 55CWE-208Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- High
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-208.
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.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00108 1st percentileScored 2026-11-07
Fix Fixed mojic (notamitgamer): 2.1.4mojic (npm): 2.1.4
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| notamitgamer | mojic | before 2.1.4 | 2.1.4 | Patch available | CNA |
| — | mojic (npm) | before 2.1.4 | 2.1.4 | Patch available | GHSA-wqq3-wfmp-v85g |
- mojic Vendornotamitgamer Affected before 2.1.4 Fixed in 2.1.4 Patch available CNA
- mojic (npm) Vendor— Affected before 2.1.4 Fixed in 2.1.4 Patch available GHSA-wqq3-wfmp-v85g
Remediation
- Fix · CNA mojic (notamitgamer) Fixed in 2.1.4
- Fix · GHSA-wqq3-wfmp-v85g mojic (npm) Fixed in 2.1.4 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-41244
- 2026-10-03 Alias added: GHSA-wqq3-wfmp-v85g
References
Sources
- CVE-2026-41244 · CVE Program
- CVE-2026-41244 · NVD
- FIRST EPSS
- GHSA-wqq3-wfmp-v85g · GitHub Advisory Database · CC BY 4.0
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