EUVD-2026-78434
GHSA-rvf3-c57p-p58j
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Authorization checks on every request
MITRE ATT&CK
1 technique across 1 tactic: Privilege Escalation The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
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Alert meAnalysisAIv1 – Sep 15, 2026
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. Publicly available exploit code exists (tracked by VulnCheck, issue #4150), the flaw is rated 7.1 with a network attack vector and low privileges required, and no CISA KEV listing has been observed at time of analysis.
Affected VersionsENISA
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 1 package in euvd
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
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
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
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.
Technical POC Analysis
CWE-862 (Missing Authorization), a blanket method-based bypass in GetMustCanMiddleware, api/projects/project.go (Semaphore UI).
Full technical POC analysis - root cause, step-by-step exploitation and patch breakdown - is part of the Pro and Business plans.
Latest POC
1 PoC candidate from github (unverified)
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Threat Intelligence Overview
NVD
CVE.org
EPSS
Vulnrichment
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.
Argument (git option) injection in Semaphore UI before 2.18.17 and 2.19.5-beta2 lets a project Manager or Owner achieve
Password takeover in Semaphore UI prior to version 2.18.21 enables an unauthenticated attacker to reset any authenticate
Remote code execution in Semaphore prior to version 2.18.20 allows authenticated project Managers and Owners to execute
Privilege escalation in Semaphore UI allows an authenticated project manager to gain owner-level project control by expl
Exploit-DB