CVE-2026-44654: LibreChat: Shared-agent editor can globally delete owner's file records — breaks owner's other private agents

Severity: high (CVSS 8.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-06-02 · updated 2026-07-21
Weakness: CWE-863

Description

LibreChat is an enhanced ChatGPT clone that supports multiple AI providers. In versions up to and including 0.8.3, a shared-agent editor can delete file records through `DELETE /api/files` that the owner has reused across multiple agents. The deletion removes the file globally — not just from the shared agent — breaking the owner's other private agents that reference the same `file_id`. The private agent retains a stale `file_id` reference that no longer resolves. A shared-agent editor can destroy files that the owner uses across multiple agents. The owner's private agents — which the attacker has no access to — break silently with stale `file_id` references. This is a cross-agent integrity violation: editing access to one agent should not affect another. Version 0.8.4 contains a patch.

Affected products

danny-avila LibreChat: before 0.8.5 — fixed in 0.8.5

How to fix

Upgrade to a fixed version: danny-avila LibreChat 0.8.5. Check the vendor advisory for mitigations.

References

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