Missing authorization in loonflow exposes ticket history to users
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- High
- Attack requirements
- Present
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- Low · None · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-639.
Summary
loonflow before r3.2.3 has a missing authorization flaw (CWE-639) in TicketFlowHistoryView. Any authenticated user can read other users' ticket flow history by supplying a ticket UUID. The exposed data includes approval comments, processor names, emails and phone numbers.
Written with Claude Haiku 5.5 from the sources below · 2026-11-04
Description from the CNA
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| blackholll | loonflow | before r3.2.3 | r3.2.3 | Patch available | CNA |
- loonflow Vendorblackholll Affected before r3.2.3 Fixed in r3.2.3 Patch available CNA
Remediation
Upgrade loonflow to r3.2.3, which fixes the flaw.
Written with Claude Haiku 5.5 from the sources below · 2026-11-04
- Fix · CNA loonflow (blackholll) Fixed in r3.2.3
Timeline
- 2026-11-04 Threatist record created from CVE-2026-121937
- 2026-11-04 Alias added: GHSA-9h6j-f6mw-p7qh
- 2026-11-04 CISA SSVC decision points changed
- 2026-11-04 Priority changed: LOW → MEDIUM
References
Sources
- CVE-2026-121937 · CVE Program
- CVE-2026-121937 · NVD
- FIRST EPSS
- GHSA-9h6j-f6mw-p7qh · GitHub Advisory Database · CC BY 4.0
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