CVE-2026-100686

HIGHPre-NVD 8.18.1—
EchelonGraph scoreHIGH confidence

Score 8.1 from GitHub Security Advisory (severity: HIGH) published 2026-09-26. A secondary CVSS source baseline 8.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
8.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 8.1Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

Budibase versions before 3.45.0 fail to validate per-app authorization in the POST /api/global/groups/:groupId/apps endpoint, allowing builders to assign application roles across workspace boundaries. A builder of a single workspace can exploit missing per-app authorization checks to grant themselves admin roles in other workspaces by modifying user group role mappings.

CVSS v3
8.1
EG Score
8.1HIGHhigh confidence
EG Risk
52
EG Risk 52/100CISA 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
Severity81% × 45%
Exploitation40% × 40%
Automatability0% × 15%
CISA SSVC: Track at low, Track* at medium and Attend at high mission impact.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.2%
EPSS %ILE
9th
KEV
Not listed

CISA SSVCTrack at low, Track* at medium and Attend at high mission impact.

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (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 26, 2026

Last Modified

September 30, 2026

Advisory Details (2)

Auto-updated Sep 26, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

Budibase before 3.45.0 Cross-Workspace Privilege Escalation via POST /api/global/groups/:groupId/apps | Advisories | VulnCheck

https://www.vulncheck.com/advisories/budibase-before-3.45.0-cross-workspace-privilege-escalation-via-post-api-global-groups-groupid-apps
github Patch Available🟡 PoC Available

Cross-workspace privilege escalation via POST /api/global/groups/:groupId/apps (missing per-app authorization) · Advisory · Budibase/budibase · GitHub

https://github.com/Budibase/budibase/security/advisories/GHSA-pp5r-q4fp-mcj3

Vendor Advisories for CVE-2026-100686(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 31× in last 7d / 37× 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 12:32 UTCGHSA enrichment
  2. 2026-10-04 01:03 UTCEG score recompute
  3. 2026-10-04 01:03 UTCGHSA enrichment
  4. 2026-10-03 14:25 UTCEPSS rescore
  5. 2026-10-03 13:34 UTCGHSA enrichment
  6. 2026-10-03 02:06 UTCEG score recompute
  7. 2026-10-03 02:05 UTCGHSA enrichment
  8. 2026-10-02 14:35 UTCGHSA enrichment
  9. 2026-10-02 02:55 UTCEG score recompute
  10. 2026-10-02 02:55 UTCGHSA enrichment
  11. 2026-10-01 19:49 UTCEPSS rescore
  12. 2026-10-01 15:25 UTCGHSA enrichment
  13. 2026-10-01 03:56 UTCGHSA enrichment
  14. 2026-09-30 16:27 UTCEG score recompute
  15. 2026-09-30 16:27 UTCGHSA enrichment
  16. 2026-09-30 15:32 UTCEG score recompute
  17. 2026-09-30 15:31 UTCGHSA enrichment
  18. 2026-09-30 15:02 UTCEPSS rescore
  19. 2026-09-30 14:54 UTCGHSA enrichment
  20. 2026-09-30 03:25 UTCGHSA enrichment
  21. 2026-09-29 15:55 UTCEG score recompute
  22. 2026-09-29 15:55 UTCGHSA enrichment
  23. 2026-09-29 15:20 UTCEPSS rescore
  24. 2026-09-29 04:27 UTCEG score recompute
  25. 2026-09-29 04:27 UTCGHSA enrichment
Show 12 more
  1. 2026-09-28 16:58 UTCEG score recompute
  2. 2026-09-28 16:58 UTCGHSA enrichment
  3. 2026-09-28 13:50 UTCEPSS rescore
  4. 2026-09-28 12:28 UTCGHSA enrichment
  5. 2026-09-28 00:59 UTCEG score recompute
  6. 2026-09-28 00:59 UTCGHSA enrichment
  7. 2026-09-27 13:30 UTCGHSA enrichment
  8. 2026-09-27 01:59 UTCEG score recompute
  9. 2026-09-27 01:59 UTCGHSA enrichment
  10. 2026-09-26 14:31 UTCEG score recompute
  11. 2026-09-26 13:35 UTCEG score recompute
  12. 2026-09-26 13:30 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-100686?
CVE-2026-100686 is a high vulnerability published on September 26, 2026. Budibase versions before 3.45.0 fail to validate per-app authorization in the POST /api/global/groups/:groupId/apps endpoint, allowing builders to assign application roles across workspace boundaries. A builder of a single workspace can exploit missing per-app authorization checks to grant…
When was CVE-2026-100686 disclosed?
CVE-2026-100686 was first published on September 26, 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-2026-100686 actively exploited?
CVE-2026-100686 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (9th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-100686?
CVE-2026-100686 has a CVSS base score of 8.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-100686?
A fix for CVE-2026-100686 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-100686 are linked in the Vendor Advisories panel on this page.

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