CVE-2026-53970

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM 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 — 3 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: 0.3%CVSS: 7.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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
7.5HIGHmedium confidence
EG Risk
34
EG Risk 34/100CISA SSVC

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%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.3%
EPSS %ILE
15th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 14, 2026

Last Modified

September 24, 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 20× in last 7d / 95× 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.

Showing the most recent 100 of 174 total refreshes for this CVE.

  1. 2026-10-04 23:22 UTCEPSS rescore
  2. 2026-10-04 22:12 UTCGHSA enrichment
  3. 2026-10-04 08:48 UTCGHSA enrichment
  4. 2026-10-03 19:41 UTCEG score recompute
  5. 2026-10-03 19:41 UTCGHSA enrichment
  6. 2026-10-03 14:26 UTCEPSS rescore
  7. 2026-10-02 21:50 UTCEG score recompute
  8. 2026-10-02 21:50 UTCGHSA enrichment
  9. 2026-10-02 17:56 UTCEPSS rescore
  10. 2026-10-02 07:21 UTCEG score recompute
  11. 2026-10-02 07:21 UTCGHSA enrichment
  12. 2026-10-01 19:50 UTCEPSS rescore
  13. 2026-10-01 10:45 UTCGHSA enrichment
  14. 2026-09-30 21:41 UTCEG score recompute
  15. 2026-09-30 21:41 UTCGHSA enrichment
  16. 2026-09-30 15:03 UTCEPSS rescore
  17. 2026-09-29 15:22 UTCEPSS rescore
  18. 2026-09-29 02:55 UTCEG score recompute
  19. 2026-09-29 02:55 UTCGHSA enrichment
  20. 2026-09-28 13:51 UTCEPSS rescore
  21. 2026-09-28 12:33 UTCGHSA enrichment
  22. 2026-09-27 23:34 UTCEG score recompute
  23. 2026-09-27 23:34 UTCGHSA enrichment
  24. 2026-09-27 13:48 UTCEPSS rescore
  25. 2026-09-27 09:37 UTCEG score recompute
Show 75 more
  1. 2026-09-27 09:37 UTCGHSA enrichment
  2. 2026-09-26 15:59 UTCEPSS rescore
  3. 2026-09-25 09:13 UTCGHSA enrichment
  4. 2026-09-24 20:16 UTCGHSA enrichment
  5. 2026-09-24 17:16 UTCEG score recompute
  6. 2026-09-24 17:16 UTCGHSA enrichment
  7. 2026-09-24 14:04 UTCEPSS rescore
  8. 2026-09-24 02:27 UTCEG score recompute
  9. 2026-09-24 02:26 UTCGHSA enrichment
  10. 2026-09-23 17:54 UTCEPSS rescore
  11. 2026-09-23 13:29 UTCGHSA enrichment
  12. 2026-09-23 00:20 UTCEG score recompute
  13. 2026-09-23 00:20 UTCGHSA enrichment
  14. 2026-09-22 11:22 UTCGHSA enrichment
  15. 2026-09-21 22:26 UTCEG score recompute
  16. 2026-09-21 22:26 UTCGHSA enrichment
  17. 2026-09-21 09:21 UTCEG score recompute
  18. 2026-09-21 09:21 UTCGHSA enrichment
  19. 2026-09-20 20:16 UTCEPSS rescore
  20. 2026-09-20 19:06 UTCGHSA enrichment
  21. 2026-09-20 06:04 UTCGHSA enrichment
  22. 2026-09-19 17:06 UTCEG score recompute
  23. 2026-09-19 17:06 UTCGHSA enrichment
  24. 2026-09-19 04:09 UTCEG score recompute
  25. 2026-09-19 04:09 UTCGHSA enrichment
  26. 2026-09-18 19:28 UTCEPSS rescore
  27. 2026-09-18 15:11 UTCGHSA enrichment
  28. 2026-09-18 02:14 UTCEG score recompute
  29. 2026-09-18 02:14 UTCGHSA enrichment
  30. 2026-09-17 19:31 UTCEPSS rescore
  31. 2026-09-17 13:17 UTCGHSA enrichment
  32. 2026-09-16 23:49 UTCEG score recompute
  33. 2026-09-16 23:49 UTCGHSA enrichment
  34. 2026-09-16 14:08 UTCEPSS rescore
  35. 2026-09-16 05:37 UTCEG score recompute
  36. 2026-09-16 05:37 UTCGHSA enrichment
  37. 2026-09-16 05:15 UTCEPSS rescore
  38. 2026-09-15 16:41 UTCGHSA enrichment
  39. 2026-09-15 03:36 UTCEG score recompute
  40. 2026-09-15 03:35 UTCGHSA enrichment
  41. 2026-09-14 14:37 UTCGHSA enrichment
  42. 2026-09-14 01:35 UTCEG score recompute
  43. 2026-09-14 01:35 UTCGHSA enrichment
  44. 2026-09-13 16:47 UTCEPSS rescore
  45. 2026-09-13 12:37 UTCGHSA enrichment
  46. 2026-09-12 23:39 UTCEG score recompute
  47. 2026-09-12 23:39 UTCGHSA enrichment
  48. 2026-09-12 10:41 UTCGHSA enrichment
  49. 2026-09-11 21:39 UTCEG score recompute
  50. 2026-09-11 21:39 UTCGHSA enrichment
  51. 2026-09-11 14:53 UTCEPSS rescore
  52. 2026-09-11 08:42 UTCGHSA enrichment
  53. 2026-09-10 19:45 UTCEG score recompute
  54. 2026-09-10 19:45 UTCGHSA enrichment
  55. 2026-09-10 09:35 UTCEPSS rescore
  56. 2026-09-10 06:45 UTCGHSA enrichment
  57. 2026-09-09 17:47 UTCGHSA enrichment
  58. 2026-09-09 04:50 UTCEG score recompute
  59. 2026-09-09 04:50 UTCGHSA enrichment
  60. 2026-09-08 22:01 UTCEPSS rescore
  61. 2026-09-08 06:14 UTCGHSA enrichment
  62. 2026-09-07 16:25 UTCEG score recompute
  63. 2026-09-07 16:25 UTCGHSA enrichment
  64. 2026-09-07 16:01 UTCEPSS rescore
  65. 2026-09-06 18:21 UTCEG score recompute
  66. 2026-09-06 18:21 UTCGHSA enrichment
  67. 2026-09-06 13:47 UTCEPSS rescore
  68. 2026-09-06 05:24 UTCGHSA enrichment
  69. 2026-09-05 16:27 UTCEG score recompute
  70. 2026-09-05 16:27 UTCGHSA enrichment
  71. 2026-09-05 03:28 UTCGHSA enrichment
  72. 2026-09-04 14:30 UTCEG score recompute
  73. 2026-09-04 14:30 UTCGHSA enrichment
  74. 2026-09-04 05:06 UTCEPSS rescore
  75. 2026-09-04 01:33 UTCGHSA enrichment

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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 on August 14, 2026, with the most recent update on September 24, 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 0.3% probability of exploitation in the next 30 days (15th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-53970?
CVE-2026-53970 has a CVSS base score of 7.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-53970?
A fix for CVE-2026-53970 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-53970 are linked in the Vendor Advisories panel on this page.

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