Auth bypass in 3xxx Engineercms
CVE-2026-111652
Engineercms through 2.0.5 contains a missing authorization vulnerability in AttachController.Attachment that allows unauthenticated attackers to download project image and video attachments. Attackers can request known or derived /attachment/* paths for .jpg, .png, .bmp, or .mp4 files, which are served before casbin, owner, or admin checks.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- hackmd.io/@hieuPenguinnn/engineercms-attachment-image-mp4-missing-authz (third-party-advisory)
- github.com/3xxx/engineercms/blob/v2.0.5/controllers/attachment.go (technical-description)
- github.com/3xxx/engineercms (product)
- www.vulncheck.com/advisories/engineercms-through-2.0.5-missing-authorization-vi… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-111652?
- CVE-2026-111652 is a medium-severity vulnerability in 3xxx Engineercms, classified under Missing Authorization. CVSS score: 5.3/10. Published 2026-10-16.
- How severe is CVE-2026-111652?
- Medium severity. CVSS v3 base score is 5.3 out of 10.