CVE-2026-53970
ZeroBrew version 0.3.1 and prior Missing Checksum Verification RCE via shim.rb
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
ZeroBrew version 0.3.1 and prior contains a missing integrity verification vulnerability in the Ruby compatibility shim that allows network attackers to execute arbitrary code by substituting malicious content at formula resource or URL-based patch URLs without checksum validation. Attackers can intercept or replace downloads for secondary resource and patch paths in shim.rb, injecting attacker-controlled build steps or source tree modifications that execute during source builds via 'zb install --build-from-source' without any integrity warning.
| CWE | CWE-494 |
| Vendor | lucasgelfond |
| Product | zerobrew |
| Published | Aug 14, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
lucasgelfond / ZeroBrew
0 ≤ 0.3.1
References
Credits
Katriel Moses