CVE-2026-23522: @lobehub/chat Lobe Chat Has IDOR Vulnerability

LOW
Advisory Identifier: GHSA-j7xp-4mg9-x28r
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CVSS 3.7
CWE-284
Published
Advisory Summary

CVE-2026-23522 is a LOW (CVSS 3.7) lobe chat has idor vulnerability (CWE-284: Improper Access Control) affecting @lobehub/chat libraries in the npm ecosystem. The issue involves lobe chat has idor in knowledge base file removal that allows cross user file deletion. Remediation is available in the latest vendor maintenance releases.

CVE-2026-23522 at a Glance

CVE Identifier CVE-2026-23522
GHSA Identifier GHSA-j7xp-4mg9-x28r
Severity LOW
CVSS v3.1 Base Score 3.7
CWE Classification CWE-284: Improper Access Control
Affected Product @lobehub/chat
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 3.7

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N).

Attack Vector Network (AV:N)
Attack Complexity High (AC:H)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity Low (I:L)
Availability None (A:N)

How to Fix CVE-2026-23522

To remediate this vulnerability, upgrade all affected @lobehub/chat dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

@lobehub/chat fixed: Latest secure release 
npm install @lobehub/chat@Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

npm ls @lobehub/chat

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2026-23522, inspect your project dependencies using npm:

npm ls @lobehub/chat

Analyze the terminal output to locate any version of @lobehub/chat in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The npm ls @lobehub/chat command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-284: Improper Access Control, where the product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. In @lobehub/chat, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Summary `knowledgeBase.removeFilesFromKnowledgeBase` tRPC ep allows authenticated users to delete files from any knowledge base without verifying ownership. ### Details `userId` filter in the database query is commented out, so it's enabling attackers to delete other users' KB files if they know the knowledge base ID and file ID. ### PoC ``` ATTACKER_TOKEN="xx" VICTIM_KB="kb_tuLBfskdDN1r" VICTIM_FILE="file_v5wCNLqSaoPp" curl -X POST "https://localhost/trpc/lambda/knowledgeBase.removeFilesFromKnowledgeBase?batch=1" -H "Content-Type: application/json" -b "__Secure-better-auth.session_token=$ATTACKER_TOKEN" -d '{"0":{"json":{"knowledgeBaseId":"'"$VICTIM_KB"'","ids":["'"$VICTIM_FILE"'"]}}}' ``` Response: `{"result":{"data":{"json":{"command":"DELETE","rowCount":1,"oid":null,"rows":[],"fields":[]}}}}` ### Impact An attacker can delete files from any user's KB. RAG/AI functionality broken when files removed. It could cause loss of important documents, proprietary data etc. While the vuln is confirmed, practical exploitation requires knowing target's KB ID and target's file ID. These IDs are random and not easily enumerable. However, IDs may leak through shared links, logs, referrer headers and so on. Missing authorization check is a critical security flaw regardless.

CVE-2026-23522 Affected @lobehub/chat Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
@lobehub/chat
npm/@lobehub/chat
npm
≤ 1.143.2

References

GitHub Advisory / Wiki ADVISORY
https://github.com/lobehub/lobe-chat/security/advisories/GHSA-j7xp-4mg9-x28r
NVD — CVE-2026-23522 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-23522
Security Fix Commit FIX COMMIT
https://github.com/lobehub/lobe-chat/commit/2c1762b85acb84467ed5e799afe1499cd2f912e6
@lobehub/chat Source Repository REPOSITORY
https://github.com/lobehub/lobe-chat

Frequently Asked Questions

What is CVE-2026-23522?
CVE-2026-23522 is a security vulnerability in @lobehub/chat involving Lobe Chat has IDOR in Knowledge Base File Removal that Allows Cross User File Deletion under CWE-284: Improper Access Control.
Which @lobehub/chat versions are affected?
Affected versions include releases prior to current release patches across affected packages: @lobehub/chat.
What version fixes CVE-2026-23522?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is @lobehub/chat affected?
Yes, @lobehub/chat is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2026-23522?
CVE-2026-23522 has a CVSS v3.1 base score of 3.7 (LOW) with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N.
What CWE is associated with CVE-2026-23522?
CVE-2026-23522 is classified under CWE-284: Improper Access Control (The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.).
How can I check npm dependencies for CVE-2026-23522?
Run the dependency tree command: 'npm ls @lobehub/chat'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-j7xp-4mg9-x28r",
  "modified" : "2026-01-20T17:14:39Z",
  "published" : "2026-01-20T17:14:39Z",
  "aliases" : [ "CVE-2026-23522" ],
  "summary" : "Lobe Chat has IDOR in Knowledge Base File Removal that Allows Cross User File Deletion",
  "details" : "### Summary\n\n`knowledgeBase.removeFilesFromKnowledgeBase` tRPC ep allows authenticated users to delete files from any knowledge base without verifying ownership.\n\n### Details\n\n`userId` filter in the database query is commented out, so it's enabling attackers to delete other users' KB files if they know the knowledge base ID and file ID.\n\n### PoC\n\n```\nATTACKER_TOKEN=\"xx\"\n\nVICTIM_KB=\"kb_tuLBfskdDN1r\"\nVICTIM_FILE=\"file_v5wCNLqSaoPp\"\n\ncurl -X POST \"https://localhost/trpc/lambda/knowledgeBase.removeFilesFromKnowledgeBase?batch=1\" -H \"Content-Type: application/json\" -b \"__Secure-better-auth.session_token=$ATTACKER_TOKEN\" -d '{\"0\":{\"json\":{\"knowledgeBaseId\":\"'\"$VICTIM_KB\"'\",\"ids\":[\"'\"$VICTIM_FILE\"'\"]}}}'\n```\n\nResponse:\n\n`{\"result\":{\"data\":{\"json\":{\"command\":\"DELETE\",\"rowCount\":1,\"oid\":null,\"rows\":[],\"fields\":[]}}}}`\n\n### Impact\n\nAn attacker can delete files from any user's KB. RAG/AI functionality broken when files removed. It could cause loss of important documents, proprietary data etc.\n\nWhile the vuln is confirmed, practical exploitation requires knowing target's KB ID and target's file ID. These IDs are random and not easily enumerable. However, IDs may leak through shared links, logs, referrer headers and so on. Missing authorization check is a critical security flaw regardless.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "@lobehub/chat"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "1.143.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/lobehub/lobe-chat/security/advisories/GHSA-j7xp-4mg9-x28r"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-23522"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/lobehub/lobe-chat/commit/2c1762b85acb84467ed5e799afe1499cd2f912e6"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/lobehub/lobe-chat"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-284" ],
    "severity" : "LOW",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-01-20T17:14:39Z",
    "nvd_published_at" : "2026-01-19T17:15:50Z"
  }
}