CVE-2026-91994

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreHIGH confidence

Score 6.5 from GitHub Security Advisory (severity: HIGH) published 2026-09-15. a secondary CVSS source baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: Elevated riskExposed: 0

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

Semaphore UI through 2.19.12 exempts GET and HEAD requests from project resource permission checks in GetMustCanMiddleware. Attackers with guest or task_runner roles can read all project environments including plaintext secrets, credentials, and passwords via GET requests to the environment endpoint.

CVSS v3
6.5
EG Score
6.5(high)
EG Risk
45(Track)
EG Risk 45/100SSVC: 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
Severity65% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
33%
KEV
Not listed

Published

September 15, 2026

Last Modified

September 24, 2026

Advisory Details (5)

Auto-updated Sep 15, 2026
No patch confirmed yet.
generic

Semaphore UI through 2.19.12 Missing Authorization on GET and HEAD Requests | Advisories | VulnCheck

https://www.vulncheck.com/advisories/semaphore-ui-through-2.19.12-missing-authorization-on-get-and-head-requests
generic

GitHub - semaphoreui/semaphore: Modern UI and powerful API for Ansible, Terraform/OpenTofu/Terragrunt, PowerShell and other DevOps tools. · GitHub

https://github.com/semaphoreui/semaphore
generic

semaphore/api/router.go at v2.19.12 · semaphoreui/semaphore · GitHub

https://github.com/semaphoreui/semaphore/blob/v2.19.12/api/router.go#L308-L329
generic

semaphore/api/projects/project.go at v2.19.12 · semaphoreui/semaphore · GitHub

https://github.com/semaphoreui/semaphore/blob/v2.19.12/api/projects/project.go#L89-L106
generic

Guest/task-runner project members can read Ansible environment secrets via GET bypass in GetMustCanMiddleware · Issue #4150 · semaphoreui/semaphore · GitHub

https://github.com/semaphoreui/semaphore/issues/4150

Vendor Advisories for CVE-2026-91994(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 22× in last 7d / 36× 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. 2026-09-24 20:35 UTCEG score recompute
  2. 2026-09-24 20:35 UTCGHSA enrichment
  3. 2026-09-24 14:52 UTCEG score recompute
  4. 2026-09-24 14:52 UTCGHSA enrichment
  5. 2026-09-24 14:04 UTCEPSS rescore
  6. 2026-09-23 23:11 UTCEG score recompute
  7. 2026-09-23 23:11 UTCGHSA enrichment
  8. 2026-09-23 17:54 UTCEPSS rescore
  9. 2026-09-23 00:45 UTCEG score recompute
  10. 2026-09-23 00:45 UTCGHSA enrichment
  11. 2026-09-22 16:01 UTCEPSS rescore
  12. 2026-09-22 02:22 UTCEG score recompute
  13. 2026-09-22 02:21 UTCGHSA enrichment
  14. 2026-09-21 21:09 UTCEPSS rescore
  15. 2026-09-21 03:57 UTCEG score recompute
  16. 2026-09-21 03:57 UTCGHSA enrichment
  17. 2026-09-20 20:16 UTCEPSS rescore
  18. 2026-09-20 05:33 UTCEG score recompute
  19. 2026-09-20 05:33 UTCGHSA enrichment
  20. 2026-09-19 07:09 UTCEG score recompute
  21. 2026-09-19 07:09 UTCGHSA enrichment
  22. 2026-09-18 19:28 UTCEPSS rescore
  23. 2026-09-18 08:45 UTCEG score recompute
  24. 2026-09-18 08:45 UTCGHSA enrichment
  25. 2026-09-17 19:32 UTCEPSS rescore
Show 11 more
  1. 2026-09-17 10:21 UTCEG score recompute
  2. 2026-09-17 10:21 UTCGHSA enrichment
  3. 2026-09-16 14:09 UTCEPSS rescore
  4. 2026-09-16 11:57 UTCGHSA enrichment
  5. 2026-09-15 13:33 UTCEG score recompute
  6. 2026-09-15 13:33 UTCGHSA enrichment
  7. 2026-09-15 12:53 UTCEG score recompute
  8. 2026-09-15 12:53 UTCGHSA enrichment
  9. 2026-09-15 12:30 UTCEG score recompute
  10. 2026-09-15 11:43 UTCEG score recompute
  11. 2026-09-15 11:42 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-91994?
CVE-2026-91994 is a medium vulnerability published on September 15, 2026. Semaphore UI through 2.19.12 exempts GET and HEAD requests from project resource permission checks in GetMustCanMiddleware. Attackers with guest or task_runner roles can read all project environments including plaintext secrets, credentials, and passwords via GET requests to the environment…
When was CVE-2026-91994 disclosed?
CVE-2026-91994 was first published in the National Vulnerability Database on September 15, 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-2026-91994 actively exploited?
CVE-2026-91994 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 67.0% of all scored CVEs.
What is the CVSS score of CVE-2026-91994?
CVE-2026-91994 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-91994?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-91994, 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

Explore the affected products and dependency analysis for CVE-2026-91994

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