CVE-2026-55186— Silverstripe MFA: Can bypass MFA during password reset flow

Quick assessment

Affected

silverstripe silverstripe-mfa

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Silverstripe MFA 为 Silverstripe CMS 提供多因素认证功能。在 6.0.0 版本之前，当用户在完成其配置的多因素认证挑战之前修改密码时，CMS 5 的密码重置流程可能会直接发放已登录的会话。攻击者若能访问目标用户的电子邮件账户，即可利用该重置流程绕过额外的认证因素。CMS 6 不受此问题影响。该漏洞已在 6.0.0 版本中修复。

CVSS 4.2 · Medium Updated Nov 04, 2026

Possible ATT&CK Techniques 3 AI

T1550.003 · Pass the Ticket T1078.004 · Cloud Accounts T1190 · Exploit Public-Facing Application

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Vulnerability Information

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Vulnerability Title

Silverstripe MFA: Can bypass MFA during password reset flow

Source: CVE Program / CVE List V5

Vulnerability Description

Silverstripe MFA provides multi-factor authentication for Silverstripe CMS. Prior to 6.0.0, the CMS 5 password reset flow can issue a logged-in session after a user changes a password but before the user's configured multi-factor authentication challenge is completed. An attacker with access to the user's email account can follow the reset flow and bypass the additional authentication factor. CMS 6 is not affected. This issue is fixed in version 6.0.0.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N

Source: CVE Program / CVE List V5

Vulnerability Type

使用候选路径或通道进行的认证绕过

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
silverstripe	silverstripe-mfa	< 6.0.0	-

II. Public POCs for CVE-2026-55186

#	POC Description	Source Link	Shenlong Link

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III. Intelligence Information for CVE-2026-55186

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Other References for CVE-2026-55186 (7)

https://github.com/silverstripe/silverstripe-mfa/pull/603 x_refsource_MISC
https://github.com/silverstripe/silverstripe-framework/pull/11686 x_refsource_MISC
https://github.com/silverstripe/silverstripe-mfa/releases/tag/6.0.0 x_refsource_MISC
https://www.silverstripe.org/download/security-releases/cve-2026-55186 x_refsource_MISC
https://github.com/silverstripe/silverstripe-mfa/security/advisories/GHSA-68wq-phq7-p2vg x_refsource_CONFIRM
https://github.com/silverstripe/silverstripe-mfa/commit/04a102b662ac2f555acc26f8d2e2d8dab3937a6a x_refsource_MISC
https://github.com/silverstripe/silverstripe-framework/commit/4b5cbd7ddf68721d8119583f0b9c04d4b4adc704 x_refsource_MISC

https://www.cve.org/CVERecord?id=CVE-2026-55186

IV. Related Vulnerabilities

Same vendor: silverstripe

Same weakness: CWE-288