CVE-2026-79917

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.

Overview

State: PUBLISHED
Assigner (CNA): GitHub_M
CVSS severity: MEDIUM
CVSS score: 6.5 / 10
CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N
Effective score: 6.5 / 10 MEDIUM source: CNA overview
CWE(s): CWE-285, CWE-639
Reserved: 2026-08-25
Published: 2026-09-21 20:43 UTC
Last updated: 2026-09-21 20:43 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/79xxx/CVE-2026-79917.json

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published: 2026-09-21 21:17:12 UTC
NVD last modified: 2026-09-21 21:17:12 UTC
NVD CVSS v3.1: 6.5 / 10 MEDIUM source: security-advisories@github.com
NVD CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N
Exploitability subscore: 2.2 / 10
Impact subscore: 4.2 / 10

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID: EUVD-2026-84158
Assigner: GitHub_M
Published: Sep 21, 2026, 8:43:27 PM
Updated: Sep 21, 2026, 8:43:27 PM
EUVD base score (CVSS 3.1): 6.5 / 10
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N
EUVD-reported EPSS: 0.0000
Vendors: 1Panel-dev
Products: MaxKB (2.7.0, ≤ 2.10.4-lts)

ENISA 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.

EUVD references (1)

https://github.com/1Panel-dev/MaxKB/security/advisories/GHSA-m8gr-554p-8r82

Affected products (1)

Vendor	Product	Versions	Platforms
1Panel-dev	MaxKB	`>= 2.7.0, <= 2.10.4-lts` (affected)	—

Vendor references (1)

References embedded in the original CVE record by the assigning CNA.

https://github.com/1Panel-dev/MaxKB/security/advisories/GHSA-m8gr-554p-8r82 x_refsource_CONFIRM

Web references (0)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

No web references attached yet.

NVD-tagged references (1)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

https://github.com/1Panel-dev/MaxKB/security/advisories/GHSA-m8gr-554p-8r82 security-advisories@github.com

Remediations (10)

RHSA-2026:69917 - Security Advisory - Red Hat Customer Portal

web:access.redhat.com

Issued: 2026 -09-22 Updated: 2026 -09-22 RHSA-2026:69917 - Security Advisory

2026-09-22 17:09 UTC
Critical Docker Sandboxes Flaw Lets Malicious Guests Escape Isolation ...

web:cyberpress.org

Docker has released security fixes for two serious vulnerabilities in Docker Sandboxes that could allow a malicious guest environment to break workspace isolation and reach sensitive host-side resources.

2026-09-22 17:09 UTC
Security Update Guide - Microsoft

web:msrc.microsoft.com

The Microsoft Security Response Center (MSRC) investigates all reports of security vulnerabilities affecting Microsoft products and services, and provides the information here as part of the ongoing effort to help you manage security risks and help keep your systems protected.

2026-09-22 17:09 UTC
Security Update Guide - Microsoft Security Response Center

web:portal.msrc.microsoft.com

Security Update Guide - Microsoft Security Response Center

2026-09-22 17:09 UTC
Microsoft Patch Tracker (September 2026): Exploit-Ranked | Senserva

web:senserva.com

Every Microsoft security patch (KB) and the CVEs it fixes, with severity, CVSS, and CISA KEV status. Cross-linked to the CVE reference.

2026-09-22 17:09 UTC
Description of the security update for Office 2016: August 11, 2026 ...

web:support.microsoft.com

Be aware that the update in the Microsoft Download Center applies to the Microsoft Installer (.msi)-based edition of Office 2016. It doesn't apply to the Office 2016 Click-to-Run editions, such as Microsoft Office 365 Home. (See What version of Office am I using?) How to get and install the update Method 1: Microsoft Update This update is available from Microsoft Update. When you turn on ...

2026-09-22 17:09 UTC
SAP Security Patch Day - June 2026

web:support.sap.com

SAP security Patch Day Bulletin This post shares the information on security notes that remediate vulnerabilities discovered in SAP products. SAP strongly recommends that the customer visits the support portal and applies patches on priority to protect their SAP landscape. On 9th of June 2026 , SAP security patch day saw the release of 15 new security notes.

2026-09-22 17:09 UTC
CVE-2026-49179: Patch Windows AD DS RCE on Domain Controllers

web:windowsforum.com

Microsoft published CVE - 2026 -49179, a Windows Active Directory Domain Services remote code execution vulnerability, at 7:00 a.m.

2026-09-22 17:09 UTC
DSA-2026-359: Security Update for Dell OpenManage Enterprise ...

web:www.dell.com

Dell OpenManage Enterprise remediation is available for multiple security vulnerabilities that may be exploited by malicious users to compromise the affected system.

2026-09-22 17:09 UTC
Oracle Critical Patch Update Advisory - July 2026

web:www.oracle.com

This Critical Patch Update contains 1448 new security patches across the product families listed below. Please note that a My Oracle Support (MOS) note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at July 2026 Critical Patch Update: Executive Summary and Analysis.

2026-09-22 17:09 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-79917.json.

{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "MaxKB",
          "vendor": "1Panel-dev",
          "versions": [
            {
              "status": "affected",
              "version": ">= 2.7.0, <= 2.10.4-lts"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-285",
              "description": "CWE-285: Improper Authorization",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-639",
              "description": "CWE-639: Authorization Bypass Through User-Controlled Key",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-21T20:43:27.292Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/1Panel-dev/MaxKB/security/advisories/GHSA-m8gr-554p-8r82",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/1Panel-dev/MaxKB/security/advisories/GHSA-m8gr-554p-8r82"
        }
      ],
      "source": {
        "advisory": "GHSA-m8gr-554p-8r82",
        "discovery": "UNKNOWN"
      },
      "title": "MaxKB: Chat share-link endpoint missing owner check: a chat token can publish another user's conversation"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-79917",
    "datePublished": "2026-09-21T20:43:27.292Z",
    "dateReserved": "2026-08-25T14:59:32.746Z",
    "dateUpdated": "2026-09-21T20:43:27.292Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}