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CVE-2026-54029— LibreChat: IDOR in Message Deletion — Incomplete Fix for CVE-2024-41703 Leaves deleteMessages() Without User Filter

Quick assessment

Affected
danny-avila LibreChat
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.

danny-avila LibreChat是danny-avila个人开发者的 Danny Avila LibreChat 0.8.4-rc1之前版本存在授权问题漏洞，该漏洞源于DELETE /api/messages/:conversationId/:messageId端点中缺少用户约束，可能导致任意经过身份验证的用户删除其他用户的消息，造成永久且不可恢复的消息删除。

CVSS 5.3 · Medium EPSS 0.27% · P18

Possible ATT&CK Techniques 1 AI

T1485 · Data Destruction

Affected Version Matrix 1

VendorProduct Version RangeStatus
danny-avila LibreChat < 0.8.4-rc1 affected
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I. Basic Information for CVE-2026-54029

Vulnerability Information
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Vulnerability Title
LibreChat: IDOR in Message Deletion — Incomplete Fix for CVE-2024-41703 Leaves deleteMessages() Without User Filter
Source: CVE Program / CVE List V5
Vulnerability Description
LibreChat is an enhanced ChatGPT clone that supports multiple AI providers. Prior to 0.8.4-rc1, the DELETE /api/messages/:conversationId/:messageId endpoint allows any authenticated user to delete any other user's messages. The validateMessageReq middleware only validates that the conversationId belongs to the requesting user, but the handler calls deleteMessages({ messageId }) using only the messageId as the MongoDB filter — without adding a user constraint. An attacker provides their own valid conversationId (to pass validation) and the victim's messageId (to target deletion), resulting in permanent, irrecoverable message deletion. This vulnerability is fixed in 0.8.4-rc1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
Danny Avila LibreChat 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
danny-avila LibreChat是danny-avila个人开发者的 Danny Avila LibreChat 0.8.4-rc1之前版本存在授权问题漏洞，该漏洞源于DELETE /api/messages/:conversationId/:messageId端点中缺少用户约束，可能导致任意经过身份验证的用户删除其他用户的消息，造成永久且不可恢复的消息删除。
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
danny-avila LibreChat < 0.8.4-rc1 -

II. Public POCs for CVE-2026-54029

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III. Intelligence Information for CVE-2026-54029

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Vendor Advisories for CVE-2026-54029 (1)

Same Patch Batch · danny-avila · 2026-06-25 · 9 CVEs total

CVE-2026-54030 8.0 HIGH LibreChat: Missing Resource Parameter Validation in MCP OAuth Flow
CVE-2026-54033 7.7 HIGH LibreChat: SSRF via User-Provided Custom Endpoint baseURL — no private IP validation on us
CVE-2026-54027 6.5 MEDIUM LibreChat: Image Upload Route Bypasses Agent Permission Check — Incomplete Fix for File Up
CVE-2026-54037 6.5 MEDIUM LibreChat: Incomplete Fix for CVE-2025-7105 — /api/convos/duplicate Lacks Rate Limiting Ap
CVE-2026-54024 6.5 MEDIUM LibreChat: Incomplete Fix for CVE-2024-11171 — Conversation Import Multer Instance Missing
CVE-2026-54040 5.9 MEDIUM LibreChat: 2FA Backup Code Regeneration Without OTP Verification Allows 2FA Bypass
CVE-2026-54025 5.4 MEDIUM LibreChat: Stored XSS via unescaped image alt text in markdown artifact preview
CVE-2026-54036 5.3 MEDIUM LibreChat: 2FA Re-enrollment Allows Full Account 2FA Takeover Without OTP Verification

IV. Related Vulnerabilities

Same product: LibreChat
Same vendor: danny-avila
Same weakness: CWE-862

V. Comments for CVE-2026-54029

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