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CVE-2026-121937 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:3.1 LOWVector:CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://hackmd.io/@hieuPenguinnn/cve-2026-121937-loonflow-ticket-flow-history-idor	CISA-ADP
https://github.com/blackholll/loonflow/blob/r3.2.2/backend/apps/ticket/views.py#L265-L286	[email protected]
https://github.com/blackholll/loonflow/commit/a6495b0c2ca9e5dede8e49217a0468bcfa946de4	[email protected]
https://github.com/blackholll/loonflow/issues/591	[email protected]
https://hackmd.io/@hieuPenguinnn/loonflow-ticket-flow-history-idor	[email protected]
https://www.vulncheck.com/advisories/loonflow-before-r3-2.3-idor-via-ticket-flow-history-endpoint	[email protected]

see all 6 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-639	Authorization Bypass Through User-Controlled Key	[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

Date	Action	Recorded By
Nov 4, 2026	CVE Modified	CISA-ADP
Nov 4, 2026	New CVE Received	[email protected]