Vulnerability details

CVE-2026-111690

suyuan32 simple-admin-core

Simple Admin Core through 1.8.7 Hard-Coded JWT Secret Authentication Bypass

CVSS 4.0

9.3Critical

Official 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 scores

Score	Version	Source	Vector
9.3Critical	4.0	CVEProject cvelistV5 (CNA) (VulnCheck)	`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`
9.8Critical	3.1	CVEProject cvelistV5 (CNA) (VulnCheck)	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`

Affected products

Vendor	Product	Versions	Source
suyuan32	simple-admin-core	v ≤ 1.8.7	CVEProject cvelistV5 (CNA)

References and advisories

https://github.com/suyuan32/simple-admin-core/blob/v1.8.7/api/etc/core.yaml#L6-L8 technical-description
https://github.com/suyuan32/simple-admin-core/pull/382 issue-trackingpatch
https://www.vulncheck.com/advisories/simple-admin-core-through-1.8.7-hard-coded-jwt-secret-authentication-bypass third-party-advisory
https://hackmd.io/@hieuPenguinnn/simple-admin-core-hardcoded-jwt-accesssecret-admin-auth-bypass third-party-advisory

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Details

Published: 2026-10-16
Last updated: 2026-10-19
State: Published
Assigner (CNA): VulnCheck
Kolun priority: 26 · Low

Exploit prediction (EPSS)

0.57%

Probability of exploitation in 30 days

47.8%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: Yes
Exploitation: Proof of concept
Technical impact: Total

Weaknesses (CWE)

CWE-321
Use of Hard-coded Cryptographic Key