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CVE-2026-79917— MaxKB: Chat share-link endpoint missing owner check: a chat token can publish another user's conversation

Quick assessment

Affected
1Panel-dev MaxKB
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

MaxKB is an open-source AI assistant for enterprise. In 2.7.0 through 2.10.4-lts, POST /chat/api/{application_id}/chat/{chat_id}/share_chat verifies that a conversation exists but does not verify that it belongs to the authenticated chat_user_id or to the appl

CVSS 6.5 · Medium EPSS 0.21% · P12

Affected Version Matrix 1

VendorProduct Version RangeStatus
1Panel-dev MaxKB >= 2.7.0, <= 2.10.4-lts affected
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I. Basic Information for CVE-2026-79917

Vulnerability Information

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Vulnerability Title
MaxKB: Chat share-link endpoint missing owner check: a chat token can publish another user's conversation
Source: CVE Program / CVE List V5
Vulnerability Description
MaxKB is an open-source AI assistant for enterprise. In 2.7.0 through 2.10.4-lts, POST /chat/api/{application_id}/chat/{chat_id}/share_chat verifies that a conversation exists but does not verify that it belongs to the authenticated chat_user_id or to the application bound to the caller's token. An attacker with any chat token and a known victim chat_id can create an unauthenticated public ChatShareLink exposing the victim's conversation and can create PublicFileAccess state that makes associated files retrievable without credentials, with no available revoke path. No fixed version is available as of this review.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
1Panel-dev MaxKB >= 2.7.0, <= 2.10.4-lts -

II. Public POCs for CVE-2026-79917

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III. Intelligence Information for CVE-2026-79917

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Other References for CVE-2026-79917 (1)

Same Patch Batch · 1Panel-dev · 2026-09-21 · 13 CVEs total

CVE-2026-77521 10.0 CRITICAL MaxKB: Prompt-injectable agent can lead to command execution
CVE-2026-79916 9.1 CRITICAL MaxKB AWS Bedrock model credential injection leads to remote code execution
CVE-2026-77523 7.4 HIGH MaxKB: Cross-workspace model parameter form write
CVE-2026-79919 6.3 MEDIUM MaxKB function-library sandbox escape: dlopen stack-check bypass via importlib meta-path c
CVE-2026-79918 6.3 MEDIUM MaxKB: Sandbox escape via unhooked fexecve
CVE-2026-77520 5.4 MEDIUM MaxKB: Homepage ranking leaks application IDs that workflow application-nodes can use to i
CVE-2026-77517 5.4 MEDIUM MaxKB cross-knowledge IDOR lets a normal user read and modify documents and paragraphs in
CVE-2026-77516 5.4 MEDIUM MaxKB: Missing per-tool authorization in the agent and workflow tool-dispatch path
CVE-2026-77519 5.4 MEDIUM MaxKB: Expired application API keys remain usable on `/chat/api/mcp`
CVE-2026-77518 5.0 MEDIUM MaxKB: Known MCP tool IDs expose owner Tool.code and can be referenced by attacker workflo
CVE-2026-77522 4.3 MEDIUM MaxKB: Authenticated full-read SSRF via the knowledge web-document import/sync crawler (Fo
CVE-2026-77525 4.2 MEDIUM MaxKB: Management chat-record routes trust path application_id but load ChatRecord by glob

IV. Related Vulnerabilities

Same product: MaxKB
Same vendor: 1Panel-dev
Same weakness: CWE-285

V. Comments for CVE-2026-79917

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