Disclosure summary
A user enumeration vulnerability was found in Portainer CE 2.19.4. This issue occurs during user authentication process, where a difference in response time could allow a remote unauthenticated user to determine if a username is valid or not.
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
GitHub Reviewed Security Advisories · GHSA-87x6-8m9v-g8c2
Open original source · Updated Sep 30, 2026
Portainer CE allows username enumeration through authentication response timing
Source severity: MEDIUM / 0
| Ecosystem | Package | Affected range | First patched |
|---|---|---|---|
| go | github.com/portainer/portainer | < 0.6.1-0.20240417040827-48bc7d0d92f0 | 0.6.1-0.20240417040827-48bc7d0d92f0 |
Original records & references
- NIST NVD record
- CVE Program record
- github.com — Reviewed advisory
PUBLISHED 2024-04-10T11:30:40-04:00
MODIFIED 2026-09-30T19:23:55-04:00
INGESTED 2026-10-06T11:43:09-04:00