Simple Admin Core hard-coded JWT secret allows authentication bypass
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-321.
Summary
Simple Admin Core from suyuan32 through 1.8.7 hard-codes its JWT signing secret, a cryptographic key (CWE-321), in a configuration file. An unauthenticated remote attacker can sign a token with that public secret and a super administrator role claim, gaining full administrative control over users, roles, menus, configuration and tokens.
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
Description from the CNA
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
The sources list no fixed version for Simple Admin Core.
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
Timeline
- 2026-10-16 Threatist record created from CVE-2026-111690
- 2026-10-16 Alias added: GHSA-m87p-c3h7-7hr8
- 2026-10-19 CISA SSVC decision points changed
- 2026-10-19 Priority changed: MEDIUM → HIGH
References
Sources
- CVE-2026-111690 · CVE Program
- CVE-2026-111690 · NVD
- FIRST EPSS
- GHSA-m87p-c3h7-7hr8 · GitHub Advisory Database · CC BY 4.0
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