CVE-2026-104059 Lektor - Cross-Site Request Forgery

Lektor 3.3.14 and 3.4.0b15 contain a cross-site request forgery caused by lack of CSRF tokens, Origin/Referer validation, CORS configuration, and Host allowlisting in the admin API blueprint, letting unauthenticated attackers perform state-changing actions and data disclosure via DNS rebinding, exploit requires crafted cross-origin requests.

CVSS base score 8.1 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.14% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Cross-Site Request Forgery
Impact
Data Tampering, Information Disclosure
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
Published
1 October 2026
Updated
15 October 2026
Weakness
CWE-352

Vendor fix

Update to the latest version with CSRF protections and proper validation.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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