CVE-2025-69220Public exploitNetwork attack vector

Agent behavior modification via unchecked file uploads

Published Jan 7, 2026 · Updated Jan 7, 2026

Missing authorization in LibreChat 0.8.1-rc2 allows remote authenticated users to alter arbitrary agents through file uploads. The POST /api/files agent-upload path processes context or file-search uploads keyed by agent_id without verifying ownership or EDIT permission. Knowledge of a private agent ID is sufficient to insert instructions or searchable content that changes the agent's behavior.

CVSS severity7.1
High
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in LibreChat 0.8.1-rc2 allows remote authenticated users to alter arbitrary agents through file uploads. The POST /api/files agent-upload path processes context or file-search uploads keyed by agent_id without verifying ownership or EDIT permission. Knowledge of a private agent ID is sufficient to insert instructions or searchable content that changes the agent's behavior.

The record

CVE
CVE-2025-69220
Published
Jan 7, 2026
Updated
Jan 7, 2026
Vendor
Danny Avila
Product
LibreChat
Classifications
CWE-862, CWE-284, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 7, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 7, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 0.8.1-rc2, < 0.8.2-rc2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Danny Avila · LibreChatversion=>= 0.8.1-rc2, < 0.8.2-rc2

Published CVSS scores

7.1GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:L
5.9NIST NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-862Missing Authorization
CWE-284Improper Access Control
T1565.001Stored Data Manipulation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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