Vulnerability · Published Sep 21, 2026 · Assigned by GitHub_M

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

Medium 6.5

In plain English

A medium-severity authorization bypass via user-controlled key in MaxKB from 1Panel-dev. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 19% of all known vulnerabilities).

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.3%top 81.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

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

Weakness: CWE-285, CWE-639 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N

References

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