CVE-2026-121937— loonflow before r3.2.3 IDOR via ticket_flow_history Endpoint

Quick assessment

Affected

blackholll loonflow

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.

在 r3.2.3 版本之前的 loonflow 中存在一个授权缺失漏洞，位于 TicketFlowHistoryView 组件中。该漏洞允许任何已认证用户通过提供工单 UUID，读取其他用户的工单流转历史记录。攻击者可请求 ticket_flow_history 接口，该接口会跳过 ticket_view_permission_check 权限检查，从而获取审批意见、处理人姓名、邮箱及电话号码等敏感信息。

CVSS 3.1 · Low Updated Nov 05, 2026

Possible ATT&CK Techniques 1 AI

T1086

Get alerts for future matching vulnerabilities Log in to subscribe

Vulnerability Information

Have questions about the vulnerability? See if Shenlong's analysis helps!

View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title

loonflow before r3.2.3 IDOR via ticket_flow_history Endpoint

Source: CVE Program / CVE List V5

Vulnerability Description

loonflow before r3.2.3 contains a missing authorization vulnerability in TicketFlowHistoryView that allows any authenticated user to read other users' ticket flow history by supplying a ticket UUID. Attackers can request the ticket_flow_history endpoint, which skips ticket_view_permission_check, to obtain approval comments and processor names, emails and phone numbers.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/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
blackholll	loonflow	0 ~ r3.2.3	-

II. Public POCs for CVE-2026-121937

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-121937

请登录查看更多情报信息。

Other References for CVE-2026-121937 (5)

https://github.com/blackholll/loonflow/blob/r3.2.2/backend/apps/ticket/views.py#L265-L286 technical-description
https://hackmd.io/@hieuPenguinnn/loonflow-ticket-flow-history-idor third-party-advisory
https://github.com/blackholll/loonflow/issues/591 issue-tracking
https://github.com/blackholll/loonflow/commit/a6495b0c2ca9e5dede8e49217a0468bcfa946de4 patch
https://www.vulncheck.com/advisories/loonflow-before-r3-2.3-idor-via-ticket-flow-history-endpoint third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2026-121937

IV. Related Vulnerabilities

Same weakness: CWE-639