CVE-2026-119048— JeeSite 5.11.0 through 5.19.1 IDOR in AI CMS Chat Module

Quick assessment

Affected

thinkgem JeeSite

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.

JeeSite 5.11.0 至 5.19.1 版本在 AI CMS 聊天模块中存在不安全的直接对象引用（IDOR）漏洞。由于缺失且逻辑反转的所有权验证，已认证用户可以访问其他用户的对话内容。攻击者若知晓或能够推导出受害者的对话 ID，即可通过调用、或接口，读取、删除或向受害者的 AI 聊天记录追加内容。

CVSS 4.2 · Medium Updated Oct 29, 2026

Possible ATT&CK Techniques 1 AI

T1204 · User Execution

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Vulnerability Information

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Vulnerability Title

JeeSite 5.11.0 through 5.19.1 IDOR in AI CMS Chat Module

Source: CVE Program / CVE List V5

Vulnerability Description

JeeSite 5.11.0 through 5.19.1 contains an insecure direct object reference vulnerability in the AI CMS chat module that allows authenticated users to access other users' conversations due to missing and reversed ownership checks. Attackers who know or derive a victim's conversation id can call /a/cms/chat/message, /a/cms/chat/delete, or /a/cms/chat/completions to read, delete, or append to the victim's AI chat transcripts.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N

Source: CVE Program / CVE List V5

Vulnerability Type

通过用户控制密钥绕过授权机制

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
thinkgem	JeeSite	5.11.0 ~ 5.19.1	-

II. Public POCs for CVE-2026-119048

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-119048

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Other References for CVE-2026-119048 (7)

https://github.com/thinkgem/jeesite5/blob/5b5e2cf0adc45a1abe33d0f4ca149590d149b82d/modules/ai/ai-cms/src/main/java/com/jeesite/modules/ai/cms/service/AiCmsChatService.java#L111-L116 technical-description
https://github.com/thinkgem/jeesite5/blob/5b5e2cf0adc45a1abe33d0f4ca149590d149b82d/modules/ai/ai-cms/src/main/java/com/jeesite/modules/ai/cms/service/CacheChatMemoryRepository.java#L59-L62 technical-description
https://github.com/thinkgem/jeesite5 product
https://github.com/thinkgem/jeesite5/commit/cbc5ba7a37fd93f38c46ef656bd31442fe6f8015 patch
https://hackmd.io/@hieund/jeesite5-ai-cms-chat-conversation-idor technical-description
https://github.com/thinkgem/jeesite5/issues/43 issue-tracking
https://www.vulncheck.com/advisories/jeesite-5.11.0-through-5.19.1-idor-in-ai-cms-chat-module third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2026-119048

IV. Related Vulnerabilities

Same product: JeeSite

Same vendor: thinkgem

Same weakness: CWE-639