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CVE-2026-46423— Rocket.Chat: SAML signature validation skipped when IdP certificate field is empty

Quick assessment

Affected
RocketChat Rocket.Chat
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.

RocketChat rocket.chat是巴西RocketChat公司开源的一款团队协作即时通讯平台。 Rocket.Chat存在加密问题漏洞，该漏洞源于SAML服务提供实现在IdP证书字段为空时静默跳过SAML响应和断言签名验证，这可能导致默认配置下管理员启用SAML后获得公开可访问的SAML登录端点，接受未签名或攻击者提供的断言，从而绕过身份验证。以下版本受到影响：8.5.0之前版本、8.4.1之前版本、8.3.3之前版本、8.2.3之前版本、8.1.4之前版本、8.0.5之前版本、7.13.7之

AI Predicted 9.8 Difficulty: Trivial EPSS 0.22% · P12

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts

Affected Version Matrix 8

VendorProduct Version RangeStatus
RocketChat Rocket.Chat >= 8.5.0-rc.0, < 8.5.0 affected
>= 8.4.0-rc.0, < 8.4.1 affected
>= 8.3.0-rc.0, < 8.3.3 affected
>= 8.2.0-rc.0, < 8.2.3 affected
>= 8.1.0-rc.0, < 8.1.4 affected
>= 8.0.0-rc.0, < 8.0.5 affected
>= 7.11.0-rc.0, < 7.13.7 affected
< 7.10.11 affected
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I. Basic Information for CVE-2026-46423

Vulnerability Information
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Vulnerability Title
Rocket.Chat: SAML signature validation skipped when IdP certificate field is empty
Source: CVE Program / CVE List V5
Vulnerability Description
Rocket.Chat is an open-source, secure, fully customizable communications platform. Prior to 8.5.0, 8.4.1, 8.3.3, 8.2.3, 8.1.4, 8.0.5, 7.13.7, and 7.10.11, Rocket.Chat's SAML service provider implementation silently skips both SAML Response and Assertion signature validation when the configured IdP certificate field is empty. The verifySignatures routine performs an early return when serviceProviderOptions.cert is falsy, which is the default state of the setting. Because provider registration only gates on the SAML "enabled" toggle and not on the presence of a certificate, an administrator who enables SAML without pasting an IdP certificate obtains a fully wired, publicly reachable SAML login endpoint that accepts unsigned or attacker-supplied assertions. This is a default-configuration authentication-bypass class: the fail-open branch is reached with no misconfiguration beyond leaving a field at its shipped default. This vulnerability is fixed in 8.5.0, 8.4.1, 8.3.3, 8.2.3, 8.1.4, 8.0.5, 7.13.7, and 7.10.11.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
密码学签名的验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Rocket.Chat 加密问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
RocketChat rocket.chat是巴西RocketChat公司开源的一款团队协作即时通讯平台。 Rocket.Chat存在加密问题漏洞，该漏洞源于SAML服务提供实现在IdP证书字段为空时静默跳过SAML响应和断言签名验证，这可能导致默认配置下管理员启用SAML后获得公开可访问的SAML登录端点，接受未签名或攻击者提供的断言，从而绕过身份验证。以下版本受到影响：8.5.0之前版本、8.4.1之前版本、8.3.3之前版本、8.2.3之前版本、8.1.4之前版本、8.0.5之前版本、7.13.7之
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
RocketChat Rocket.Chat >= 8.5.0-rc.0, < 8.5.0 -

II. Public POCs for CVE-2026-46423

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III. Intelligence Information for CVE-2026-46423

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Vendor Advisories for CVE-2026-46423 (1)

Same Patch Batch · RocketChat · 2026-06-24 · 12 CVEs total

CVE-2026-45688 9.1 CRITICAL Rocket.Chat: Pre-Auth NoSQL Injection in CAS Login Handler leading to Arbitrary CAS/SAML U
CVE-2026-45689 9.1 CRITICAL Rocket.Chat: Pre-Auth NoSQL Injection in OAuth2 Token Endpoint leading to Arbitrary User A
CVE-2026-45687 8.5 HIGH Rocket.Chat: Authenticated Arbitrary Data Export Theft via Mass Assignment in sendFileMess
CVE-2026-55762 8.1 HIGH Rocket.Chat: Any Authenticated User Can Permanently Deregister Workspace from Rocket.Chat
CVE-2026-55759 7.4 HIGH Rocket.Chat: Apple Sign-In skips JWT claims validation, allowing expired and cross-audienc
CVE-2026-49278 6.7 MEDIUM Rocket.Chat: Livechat Visitor Profile Disclosure Leaks Bearer Token and Enables Visitor Im
CVE-2026-47733 4.4 MEDIUM Rocket.Chat: Missing URL protocol sanitization in ImageElement allows javascript: URLs in
CVE-2026-45677 Rocket.Chat: Lack of SAML Signature Check During Logout Could Lead To DoS
CVE-2026-45757 Rocket.Chat: users.deactivateIdle` deactivates accounts without revoking existing login to
CVE-2026-49277 Rocket.Chat: OAuth access and refresh tokens remain valid after account deactivation
CVE-2026-55666 Rocket.Chat: Email Parameter Fallback Leads To Account Takeover Within Apple OAuth

IV. Related Vulnerabilities

Same product: Rocket.Chat
Same vendor: RocketChat
Same weakness: CWE-347

V. Comments for CVE-2026-46423

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