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CVE-2026-45687— Rocket.Chat: Authenticated Arbitrary Data Export Theft via Mass Assignment in sendFileMessage

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存在输入验证错误漏洞，该漏洞源于sendFileMessage DDP方法将攻击者提供的文件对象直接传递给Uploads.updateFileComplete，并通过Object.assign合并到MongoDB $set更新中，没有可写字段白名单，可能导致攻击者重写自己的上传记录中的任何列，特别是store和store特定路径字段。以下版本受到影响：8.5.0之前版本、8.4

CVSS 8.5 · High EPSS 0.34% · P25

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

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-2026-45687

Vulnerability Information
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Vulnerability Title
Rocket.Chat: Authenticated Arbitrary Data Export Theft via Mass Assignment in sendFileMessage
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 sendFileMessage DDP method passes the entire attacker-supplied file object into Uploads.updateFileComplete, which merges it directly into a MongoDB $set update via Object.assign. There is no allow-list of writable fields. An attacker can therefore rewrite any column on their own upload record, notably store and the store-specific path fields. 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:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-915
Source: CVE Program / CVE List V5
Vulnerability Title
Rocket.Chat 输入验证错误漏洞
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存在输入验证错误漏洞，该漏洞源于sendFileMessage DDP方法将攻击者提供的文件对象直接传递给Uploads.updateFileComplete，并通过Object.assign合并到MongoDB $set更新中，没有可写字段白名单，可能导致攻击者重写自己的上传记录中的任何列，特别是store和store特定路径字段。以下版本受到影响：8.5.0之前版本、8.4
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-2026-45687

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III. Intelligence Information for CVE-2026-45687

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Vendor Advisories for CVE-2026-45687 (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-2026-55762 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-2026-46423 Rocket.Chat: SAML signature validation skipped when IdP certificate field is empty
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-915

V. Comments for CVE-2026-45687

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