Critical severity · published Oct 16, 2026
CVE-2026-111690
Simple Admin Core through 1.8.7 Hard-Coded JWT Secret Authentication Bypass
9.8
CVSS
0.6%
EPSS
No
On KEV
Description
Simple Admin Core through 1.8.7 contains an authentication bypass vulnerability that allows unauthenticated attackers to forge super administrator tokens by using the hard-coded Auth.AccessSecret in api/etc/core.yaml. Attackers can sign a JWT with the public secret and roleId claim 001 to gain full administrative control over users, roles, menus, API authorities, configuration and tokens.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 48% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SI
simple-admin-core · suyuan32
through 1.8.7 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-111690
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-111690
github.com
https://github.com/suyuan32/simple-admin-core/blob/v1.8.7/api/etc/core.yaml#L6-L8
github.com
https://github.com/suyuan32/simple-admin-core/pull/382
hackmd.io
https://hackmd.io/@hieuPenguinnn/simple-admin-core-hardcoded-jwt-accesssecret-admin-auth-bypass
www.vulncheck.com
https://www.vulncheck.com/advisories/simple-admin-core-through-1.8.7-hard-coded-jwt-secret-authentication-bypass