OpenMage magento-lts before 20.19.0 and 21.0.0-beta1 before 21.0.0-beta3 contains an incorrect authorization vulnerability in the template…
CVE-2026-128052
OpenMage magento-lts before 20.19.0 and 21.0.0-beta1 before 21.0.0-beta3 contains an incorrect authorization vulnerability in the template filter's {{layout}} directive, which renders arbitrary layout handles without enforcing the admin/block whitelist that the {{block}} directive applies. Administrators with rights to edit email, CMS, widget or newsletter content can embed {{layout}} with arbitrary handles to render disallowed blocks and disclose limited information.
Assessment
- CVSS
- 5.1 (v4.0)
- Severity
- Medium
- Known exploited
- Not listed in CISA KEV
- Exploit availability
- Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
- Published
- 13 November 2026
- Last updated
- 13 November 2026
- Affected
- OpenMage · magento-lts
- Assigner
- VulnCheck
CVSS vectorCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
At the source
References
- https://github.com/OpenMage/magento-lts/security/advisories/GHSA-fqq6-76qg-2r96
- https://github.com/OpenMage/magento-lts/commit/055ccb866c0fadfed2c27e8c0e9ebd10db0199df
- https://www.vulncheck.com/advisories/openmage-magento-lts-before-20.19.0-block-whitelist-bypass-via-layout-directive
- https://nvd.nist.gov/vuln/detail/CVE-2026-128052
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