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CVE-2026-54029

MEDIUM
5.3
CVSS 3.1
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.

Metadata

CVE ID
CVE-2026-54029
State
PUBLISHED
Assigner
GitHub_M
Reserved
2026-06-11 16:57 UTC
Published
2026-06-25 15:51 UTC
Last updated
2026-06-25 15:51 UTC
Primary CWE
CWE-862
CWE-862: Missing Authorization
Vendor / Product
danny-avila / LibreChat
Sources
cve.org  ·  NVD

Severity & Metrics

5.3 MEDIUM CVSS 3.1
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N
Affected products (1)
VendorProductPlatformVersions
danny-avila LibreChat — < 0.8.4-rc1
Weakness (CWE)
CWESourceDescription
CWE-862 cna CWE-862: Missing Authorization
CVSS scores (1)
ScoreSeverityVersionSourceVector
5.3 MEDIUM 3.1 cna CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N
References (1)
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