Authentication Bypass Vulnerability in 9Router by Decolua
CVE-2026-56679

8.7HIGH

Key Information:

Vendor

Decolua

Status
9router
Vendor
CVE Published:
15 July 2026

What is CVE-2026-56679?

An issue within 9Router allows authenticated users to modify critical application settings via the PATCH /api/settings endpoint. Without strict field whitelisting in place, attackers can inadvertently disable authentication and gain unauthorized access to sensitive routes, such as /api/keys and /api/providers. This vulnerability emphasizes the need for stringent access controls to protect user data and application integrity. The issue has been addressed in version 0.5.4.

Affected Version(s)

9router < 0.5.4

References

https://github.com/decolua/9router/security/advisories/GH...
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CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.