CVE-2026-66750: Let's Chat 0.3.0 through 0.4.8 contains a broken access control vulnerability that allows authenticated attackers to download file attachments from private and password-protected r
Let's Chat 0.3.0 through 0.4.8 contains a broken access control vulnerability that allows authenticated attackers to download file attachments from private and password-protected rooms they are not a member of by exploiting missing room membership checks in the file retrieval route. Attackers can enumerate adjacent MongoDB ObjectIds derived from a known file ID to recover files uploaded by other users, as the GET /files/:id/:name route in app/controllers/files.js only enforces login authentication without consulting room membership or the Room.canJoin check.
Details
Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-66750
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-667500.26% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 18% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-66750 | coverage & exploitation status | NVD · CVE.org |
More from NVD Recent CVEs
- mediumCVE-2026-67355: guzzlehttp/guzzle versions before 7.15.1 fail to preserve host-only cookie scope, storing the …2026-08-01
- mediumCVE-2026-67354: guzzlehttp/guzzle versions before 7.15.1 contain an information disclosure vulnerability in Re…2026-08-01
- mediumCVE-2026-67353: guzzlehttp/guzzle versions before 7.15.1 contain a denial of service vulnerability in the Cook…2026-08-01
- highCVE-2026-67352: luci-app-https-dns-proxy contains a stored cross-site scripting vulnerability in the resolver_…2026-08-01
- mediumCVE-2026-67344: ArcadeDB before 26.7.2 fails to enforce the UPDATE_SCHEMA database permission on the ALTER TYP…2026-08-01