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CVE-2026-77520— MaxKB: Homepage ranking leaks application IDs that workflow application-nodes can use to invoke another user's application

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 2.10.2-lts and earlier, a normal user in the same workspace can obtain another user's application_id from the homepage application question-ranking endpoint when the published victim application has ranki

CVSS 5.4 · Medium EPSS 0.17% · P7

Affected Version Matrix 1

VendorProduct Version RangeStatus
1Panel-dev MaxKB <= 2.10.2-lts affected
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I. Basic Information for CVE-2026-77520

Vulnerability Information

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Vulnerability Title
MaxKB: Homepage ranking leaks application IDs that workflow application-nodes can use to invoke another user's application
Source: CVE Program / CVE List V5
Vulnerability Description
MaxKB is an open-source AI assistant for enterprise. In 2.10.2-lts and earlier, a normal user in the same workspace can obtain another user's application_id from the homepage application question-ranking endpoint when the published victim application has ranking activity in the selected date range and the attacker knows or guesses its name, even though direct application detail and debug-open routes deny access. An attacker who can create and publish a workflow application can place the disclosed identifier in an attacker-owned workflow application-node, trigger that workflow, receive output generated by the victim application, and create durable application_chat and application_chat_record rows under the victim application because save and runtime paths do not verify permission to use the referenced application. No fixed version is available as of this review.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
1Panel-dev MaxKB <= 2.10.2-lts -

II. Public POCs for CVE-2026-77520

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III. Intelligence Information for CVE-2026-77520

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Other References for CVE-2026-77520 (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-2026-79917 6.5 MEDIUM MaxKB: Chat share-link endpoint missing owner check: a chat token can publish another user
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-2026-77517 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-862

V. Comments for CVE-2026-77520

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