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TI-2026-80486 Aliases CVE-2026-106677GHSA-3m4r-974p-rpwj

Homestay3 homestay-backend exposes conversations to other users

Priority MEDIUM 64CWE-639Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · Low · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-639.

Summary

Homestay3 homestay-backend 0.0.1-SNAPSHOT contains an insecure direct object reference in ChatServiceImpl. The service does not check that the caller is a participant of a conversation, a flaw tracked as CWE-639. An authenticated user can view conversations, read and send messages, and mark messages as read for arbitrary conversation ids.

Written with Claude Haiku 5.5 from the sources below · 2026-11-02

Description from the CNA

Homestay3 homestay-backend 0.0.1-SNAPSHOT contains an IDOR in ChatServiceImpl. An authenticated user can view conversations, read messages, send messages, and mark messages as read for arbitrary conversation ids because the service does not verify that the caller is a conversation participant.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00219 12th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

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

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for Homestay3 homestay-backend.

Written with Claude Haiku 5.5 from the sources below · 2026-11-02

Timeline

  1. 2026-10-26 Threatist record created from CVE-2026-106677
  2. 2026-10-27 Alias added: GHSA-3m4r-974p-rpwj
  3. 2026-11-02 CVSS score added · CISA ADP
  4. 2026-11-02 Weakness changed · CISA ADP
  5. 2026-11-02 CISA SSVC decision points changed
  6. 2026-11-02 Priority changed: LOW → MEDIUM

References

Other 2

Sources

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