TI-2026-47399 Aliases CVE-2026-66751 GHSA-r5q3-g4qh-p8mp

Let's Chat 0.3.0 - 0.4.8 Improper Authorization via DELETE /rooms/:room

MEDIUM 57CWE-862Published 2026-07-28 · Updated 2026-07-28

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-862.

Summary

Let's Chat 0.3.0 through 0.4.8 contains an improper authorization vulnerability that allows any authenticated user to archive any room on the server by sending a DELETE request to the rooms handler without ownership verification. Attackers can enumerate room IDs via the rooms listing endpoint and permanently archive private or password-protected rooms they cannot access, with no application-level recovery path requiring direct database intervention to restore.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00298 22nd percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by the CNA

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

Vendor	Product	Affected versions	Fixed in	Status	Source
sdelements	lets-chat	0.3.0 – 0.4.8	—	No fix listed	CNA

lets-chat Vendorsdelements Affected 0.3.0 – 0.4.8 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-66751
2026-10-03 Alias added: GHSA-r5q3-g4qh-p8mp

References

Exploit 1

Researcher Disclosure

TI-2026-47398 Let's Chat 0.3.0 - 0.4.8 Broken Access Control File Disclosure via GET /files route CVSS 4.0MEDIUM 5.3
TI-2026-47397 Let's Chat 0.4.0 - 0.4.8 Denial of Service via Null Dereference in Room Lookup CVSS 4.0HIGH 7.1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences