What’s Vulnerable › Vulnerabilities

CVE-2026-67345: MaxKey 4.1.12 DefaultRedirectResolver OAuth Authorization Code Theft

• Severity: high (CVSS 8.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-30 · updated 2026-10-23
• Weakness: CWE-183

Description

MaxKey through 4.1.12, fixed in commit ddbb72f, contains an insufficient redirect URI validation vulnerability in DefaultRedirectResolver.hostMatches() that allows remote attackers to hijack OAuth 2.0 authorization codes by supplying a crafted redirect_uri whose hostname suffix matches a registered URI without proper dot-boundary anchoring. Attackers who control a domain ending with the registered redirect URI hostname can social-engineer victims into clicking a crafted authorization URL, causing the authorization code to be issued to the attacker-controlled URI and exchanged for an access token granting access to the victim's identity.

Affected products

• dromara MaxKey: through 4.1.12

References

• https://github.com/dromara/MaxKey/commit/ddbb72fb24ab8e66aa422fb14b1177330bcffb45
• https://github.com/dromara/MaxKey/issues/269
• https://www.vulncheck.com/advisories/maxkey-defaultredirectresolver-oauth-authorization-code-theft

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