Skip to main content

Semaphore CVE-2026-91994

| EUVDEUVD-2026-78434 HIGH
Missing Authorization (CWE-862)
2026-09-15 VulnCheck GHSA-rvf3-c57p-p58j
Authentication Bypass Semaphore Semaphoreui
7.1
CVSS 4.0 · Vendor: VulnCheck
Share

Severity by source

Vendor (VulnCheck) PRIMARY
7.1 HIGH
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Primary rating from Vendor (VulnCheck) · only source for this CVE.

CVSS VectorVendor: VulnCheck

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
X

Lifecycle Timeline

3
POC Analysis Generated
Sep 15, 2026 - 15:22 vuln.today
Analysis Generated
Sep 15, 2026 - 12:05 vuln.today
CVE Published
Sep 15, 2026 - 11:35 cve.org
HIGH 7.1

DescriptionCVE.org

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.

AnalysisAI

Semaphore UI through 2.19.12 fails to enforce project-level resource permissions on GET and HEAD requests in its GetMustCanMiddleware, letting any authenticated user holding only the low-privileged guest or task_runner role read every project's environment records. Those environment records store plaintext secrets, credentials, and passwords used to reach managed infrastructure, so a read-only account can effectively harvest the keys to the entire estate. …

Unlock full vulnerability intelligence

  • Risk assessment & exploitation conditions
  • Attack chain visualization
  • Remediation with exact patch versions
  • Threat intelligence from 22 sources
  • Personal watchlist & email alerts
Continue with Google Continue with GitHub

Free forever · No credit card required

Threat intelligence, references, and detailed analysis are available after sign-in.

More in Semaphore

View all
CVE-2026-73294 CRITICAL POC
9.9 Aug 12

Argument (git option) injection in Semaphore UI before 2.18.17 and 2.19.5-beta2 lets a project Manager or Owner achieve

CVE-2026-73292 HIGH POC
8.3 Aug 12

Password takeover in Semaphore UI prior to version 2.18.21 enables an unauthenticated attacker to reset any authenticate
CVE-2026-73682 HIGH
8.7 Aug 14

Remote code execution in Semaphore prior to version 2.18.20 allows authenticated project Managers and Owners to execute

CVE-2026-73293 HIGH
8.8 Aug 12

Privilege escalation in Semaphore UI allows an authenticated project manager to gain owner-level project control by expl

Same weakness CWE-862 – Missing Authorization

View all
CVE-2023-52163 HIGH POC
8.8
CVE-2025-6205 CRITICAL POC
9.1
CVE-2025-20362 HIGH POC
8.6
CVE-2017-9232 CRITICAL POC
9.8
CVE-2023-6875 CRITICAL POC
9.8
CVE-2024-4898 CRITICAL POC
9.8
CVE-2023-32117 CRITICAL POC
9.8
CVE-2020-36719 CRITICAL POC
9.8

Same technique Authentication Bypass

View all
CVE-2023-22515 CRITICAL POC
9.8
CVE-2012-4681 CRITICAL POC
9.8
CVE-2013-2465 CRITICAL POC
9.8
CVE-2011-3544 CRITICAL POC
9.8
CVE-2022-40684 CRITICAL POC
9.8
CVE-2025-61882 CRITICAL POC
9.8
CVE-2024-0012 CRITICAL POC
9.3
CVE-2023-46805 HIGH POC
8.2

Share

CVE-2026-91994 vulnerability details – vuln.today
Back

This site uses cookies essential for authentication and security. No tracking or analytics cookies are used. Privacy Policy