Description
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.
Published: 2026-08-14
Score: 7.5 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Tue, 18 Aug 2026 02:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Mon, 17 Aug 2026 11:30:00 +0000

Type Values Removed Values Added
First Time appeared Lucasgelfond
Lucasgelfond zerobrew
Vendors & Products Lucasgelfond
Lucasgelfond zerobrew

Fri, 14 Aug 2026 15:45:00 +0000

Type Values Removed Values Added
Description 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.
Title ZeroBrew version 0.3.1 and prior Missing Checksum Verification RCE via shim.rb
Weaknesses CWE-494
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 7.5, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}


Subscriptions

Lucasgelfond Zerobrew
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-08-18T02:07:35.304Z

Reserved: 2026-06-11T16:07:12.999Z

Link: CVE-2026-53970

cve-icon Vulnrichment

Updated: 2026-08-18T02:07:31.313Z

cve-icon NVD

Status : Received

Published: 2026-08-14T16:16:57.073

Modified: 2026-08-18T02:17:27.193

Link: CVE-2026-53970

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-17T11:01:13Z

Weaknesses