CVE-2026-64682
Published:November 11, 2026
Updated:November 11, 2026
AstroBlocks is a block-first CMS for Astro projects. Prior to version 3.4.0, admin session tokens can be forged due to a hard-coded fallback JWT secret and a mismatched environment variable name. An attacker who knows the public fallback value (readable in the published package) can forge a valid session token with role: "owner" and obtain full administrative control of the CMS — creating/deleting content, users, media, redirects, and configuration. This issue has been patched in version 3.4.0.
Affected Packages
https://github.com/NauelG/astro-blocks.git (GITHUB):
Affected version(s) >=v0.10.0-alpha.1 <v3.4.0 || =v1.0.0 <v3.4.0 || =v2.0.0 <v3.4.0 || >=v3.0.0 <v3.4.0Fix Suggestion:
Update to version v3.4.0@astroblocks/astro-blocks (NPM):
Affected version(s) =2.0.0 <3.4.0 || =1.0.0 <3.4.0 || >=0.12.0-alpha.2 <3.4.0 || >=3.0.0 <3.4.0Fix Suggestion:
Update to version 3.4.0Related Resources (4)
Do you need more information?
Contact UsCVSS v4
Base Score:
9.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
9.8
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH