PT-2026-42582 · Unknown · Concrete Cms

Yonatan Drori · CVE-2026-8409 · Published 2026-05-21 · Updated 2026-05-22

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Concrete CMS versions prior to 9.5.0

Description Cross Site Request Forgery (CSRF) occurs at the 'concrete/controllers/dialog/logs/delete' endpoint. CSRF is a type of attack that tricks a victim into submitting a malicious request. It is not specified how many devices are affected or if there are real-world incidents.

Recommendations Update to version 9.5.0 or later.

Exploit

Fix

CSRF

Weakness Enumeration

CWE-352

CWE-1275

Related Identifiers

CVE-2026-8409

GHSA-56C9-XQ5G-XRF9

Affected Products

Concrete Cms

References · 8

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/8xxx/CVE-2026-8409.json · Exploit
• https://osv.dev/vulnerability/CVE-2026-8409 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-8409 · Security Note
• https://osv.dev/vulnerability/GHSA-56c9-xq5g-xrf9 · Vendor Advisory
• https://github.com/concretecms/concretecms · Note
• https://documentation.concretecms.org/9-x/developers/introduction/version-history/951-release-notes · Note
• https://t.me/CVEtracker/54563 · Telegram Post
• https://twitter.com/CVEnew/status/2057783195022541176 · Twitter Post