CVE-2026-53970

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-08-14. a secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
7.5
EG Score
7.5(high)
EG Risk
34(Track)
EG Risk 34/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity75% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
7%
KEV
Not listed

Published

August 14, 2026

Last Modified

August 18, 2026

Advisory Details (3)

Auto-updated Aug 14, 2026
Patch available. Sources: github_commit.
generic

ZeroBrew version 0.3.1 and prior Missing Checksum Verification RCE via shim.rb | Advisories | VulnCheck

https://www.vulncheck.com/advisories/zerobrew-version-and-prior-missing-checksum-verification-rce-via-shim-rb
github_commit Patch Available

commit 89a60b73c7ed (lucasgelfond/zerobrew)

Patch available: lucasgelfond/zerobrew v0.3.2 (contains commit 89a60b73c7ed)

https://github.com/lucasgelfond/zerobrew/commit/89a60b73c7edd6b662e2a085be3d981b6ebeb1aa
generic

GitHub - lucasgelfond/zerobrew: A 5-20x faster experimental Homebrew alternative · GitHub

https://github.com/lucasgelfond/zerobrew

Vendor Advisories for CVE-2026-53970(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 28× in last 7d / 28× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-08-20 22:55 UTCEPSS rescore
  2. 2026-08-20 20:21 UTCGHSA enrichment
  3. 2026-08-20 07:24 UTCGHSA enrichment
  4. 2026-08-19 18:26 UTCEG score recompute
  5. 2026-08-19 18:26 UTCGHSA enrichment
  6. 2026-08-19 17:04 UTCEPSS rescore
  7. 2026-08-19 04:13 UTCGHSA enrichment
  8. 2026-08-18 15:17 UTCEG score recompute
  9. 2026-08-18 15:17 UTCGHSA enrichment
  10. 2026-08-18 13:48 UTCEPSS rescore
  11. 2026-08-18 02:19 UTCEG score recompute
  12. 2026-08-18 02:19 UTCGHSA enrichment
  13. 2026-08-17 22:14 UTCEG score recompute
  14. 2026-08-17 22:14 UTCGHSA enrichment
  15. 2026-08-17 13:47 UTCEPSS rescore
  16. 2026-08-17 09:16 UTCGHSA enrichment
  17. 2026-08-16 20:20 UTCEG score recompute
  18. 2026-08-16 20:20 UTCGHSA enrichment
  19. 2026-08-16 14:56 UTCEPSS rescore
  20. 2026-08-16 07:23 UTCEG score recompute
  21. 2026-08-16 07:23 UTCGHSA enrichment
  22. 2026-08-16 02:14 UTCEPSS rescore
  23. 2026-08-15 18:26 UTCGHSA enrichment
  24. 2026-08-15 05:29 UTCEG score recompute
  25. 2026-08-15 05:29 UTCGHSA enrichment
Show 3 more
  1. 2026-08-14 16:31 UTCEG score recompute
  2. 2026-08-14 15:39 UTCEG score recompute
  3. 2026-08-14 15:38 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-53970?
CVE-2026-53970 is a high vulnerability published on August 14, 2026. 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…
When was CVE-2026-53970 disclosed?
CVE-2026-53970 was first published in the National Vulnerability Database on August 14, 2026, with the most recent update on August 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-53970 actively exploited?
CVE-2026-53970 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 93.2% of all scored CVEs.
What is the CVSS score of CVE-2026-53970?
CVE-2026-53970 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-53970?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-53970, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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