CVE-2026-101045

HIGHPre-NVD 8.08.0—
EchelonGraph scoreHIGH confidence

Score 8.0 from GitHub Security Advisory (severity: HIGH) published 2026-09-27. A secondary CVSS source baseline 8.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
8.0EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.8%CVSS: 8.0Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Fleet-maintained app install and uninstall scripts for macOS are generated from Homebrew cask metadata. In manifests generated before 2026-08-19, the script generator escaped this metadata at some interpolation sites but not all of them, so cask metadata containing shell metacharacters (for example $(...) command substitution) could be carried into scripts that execute as root on managed macOS hosts. An attacker who could land crafted metadata in an upstream Homebrew cask — without needing any Fleet credentials — could achieve arbitrary command execution as root on managed macOS hosts that install or uninstall the affected Fleet-maintained app; exploitation required the crafted metadata to pass both upstream Homebrew cask review and Fleet's review of the automated ingestion pull request. The fix (fleetdm/fleet#51324) landed in Fleet's ingestion pipeline on 2026-08-19 so that all manifests generated on or after that date escape cask metadata at every interpolation site; because manifests are generated centrally and distributed as pre-built content, remediation applied to all deployments with no customer action, and the code fix is included in Fleet v4.92.0.

CVSS v3
8.0
EG Score
8.0HIGHhigh confidence
EG Risk
36
EG Risk 36/100CISA 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
Severity80% × 45%
Exploitation1% × 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
0.8%
EPSS %ILE
53rd
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

September 27, 2026

Last Modified

September 30, 2026

Advisory Details (2)

Auto-updated Sep 27, 2026
Patch available. Sources: github.
generic

Fleet Homebrew Cask OS Command Injection via Metadata | Advisories | VulnCheck

https://www.vulncheck.com/advisories/fleet-homebrew-cask-os-command-injection-via-metadata
github Patch Available

OS command injection via Homebrew cask metadata in Fleet-maintained app install and uninstall scripts · Advisory · fleetdm/fleet · GitHub

https://github.com/fleetdm/fleet/security/advisories/GHSA-fv3p-h7wv-2jgm

Vendor Advisories for CVE-2026-101045(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 34× in last 7d / 34× 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. 2026-10-04 13:07 UTCGHSA enrichment
  2. 2026-10-04 01:47 UTCGHSA enrichment
  3. 2026-10-03 14:30 UTCEG score recompute
  4. 2026-10-03 14:29 UTCGHSA enrichment
  5. 2026-10-03 14:25 UTCEPSS rescore
  6. 2026-10-03 03:11 UTCEG score recompute
  7. 2026-10-03 03:11 UTCGHSA enrichment
  8. 2026-10-02 15:53 UTCGHSA enrichment
  9. 2026-10-02 04:36 UTCEG score recompute
  10. 2026-10-02 04:36 UTCGHSA enrichment
  11. 2026-10-01 19:49 UTCEPSS rescore
  12. 2026-10-01 17:19 UTCGHSA enrichment
  13. 2026-10-01 05:58 UTCGHSA enrichment
  14. 2026-09-30 18:41 UTCGHSA enrichment
  15. 2026-09-30 17:26 UTCEG score recompute
  16. 2026-09-30 17:26 UTCGHSA enrichment
  17. 2026-09-30 15:02 UTCEPSS rescore
  18. 2026-09-30 12:42 UTCGHSA enrichment
  19. 2026-09-30 01:22 UTCEG score recompute
  20. 2026-09-30 01:22 UTCGHSA enrichment
  21. 2026-09-29 15:20 UTCEPSS rescore
  22. 2026-09-29 14:04 UTCGHSA enrichment
  23. 2026-09-29 02:47 UTCEG score recompute
  24. 2026-09-29 02:47 UTCGHSA enrichment
  25. 2026-09-28 15:29 UTCEG score recompute
Show 9 more
  1. 2026-09-28 15:29 UTCGHSA enrichment
  2. 2026-09-28 14:27 UTCEG score recompute
  3. 2026-09-28 14:27 UTCGHSA enrichment
  4. 2026-09-28 13:50 UTCEPSS rescore
  5. 2026-09-28 05:41 UTCEG score recompute
  6. 2026-09-28 05:41 UTCGHSA enrichment
  7. 2026-09-27 18:24 UTCEG score recompute
  8. 2026-09-27 17:19 UTCEG score recompute
  9. 2026-09-27 17:18 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-101045?
CVE-2026-101045 is a high vulnerability published on September 27, 2026. Fleet-maintained app install and uninstall scripts for macOS are generated from Homebrew cask metadata. In manifests generated before 2026-08-19, the script generator escaped this metadata at some interpolation sites but not all of them, so cask metadata containing shell metacharacters (for example…
When was CVE-2026-101045 disclosed?
CVE-2026-101045 was first published on September 27, 2026, with the most recent update on September 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-101045 actively exploited?
CVE-2026-101045 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.8% probability of exploitation in the next 30 days (53rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-101045?
CVE-2026-101045 has a CVSS base score of 8.0 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-101045?
A fix for CVE-2026-101045 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-101045 are linked in the Vendor Advisories panel on this page.

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