7.1

CVE-2026-91994: semaphoreui semaphore Missing Authorization

CVSS: 7.1v4.0HighAwaiting analysis
Published 15-09-2026Last modified 24-09-2026
Open JSON

Vulnerability summary

CVE-2026-91994 is a high (CVSS 7.1) Missing Authorization vulnerability in semaphoreui semaphore. EPSS estimates a 0.41% chance of exploitation in the next 30 days, higher than 34.3% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
38/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.1/10
010
High · v4.0 (CVE.org)
EPSS score
0.41%
0%100%
Low · +0.11 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github

Timeline

  1. 15-09-2026
    PublishedVulnerability first disclosed.
  2. 24-09-2026
    Last modifiedVulnerability information updated.

Description

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 metrics

4 scores · 2 sources · 2 versions

EPSS trend

Probability

0.41%

Chance of exploitation in the next 30 days

Percentile

34%

Versus all other CVEs

30-day change

+0.11 pp

From 0.30% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.41%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • githubUnverified

    Semaphore

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Semaphoreui1 product

1 vendor · 1 product

References

5 links