BIT-nextcloud-2026-77164
See a problem?- Import Source
- https://github.com/bitnami/vulndb/tree/main/data/nextcloud/BIT-nextcloud-2026-77164.json
- JSON Data
- https://api.osv.dev/v1/vulns/BIT-nextcloud-2026-77164
- Aliases
-
- CVE-2026-77164
- Published
- 2026-09-25T12:27:07Z
- Modified
- 2026-09-25T14:15:15Z
- Summary
- [none]
- Details
-
Circles' remote-instance signature verification fetches the attacker-supplied keyId URL before trust in the remote instance is established, and explicitly allows local/private addresses for this request, bypassing Nextcloud's core SSRF protections. The public, unauthenticated endpoints POST /apps/circles/event/ and POST /apps/circles/incoming/ reach this code path, allowing any unauthenticated user to force the server to issue a GET request to an internal address.
The response body of the internal request is never returned to the requester, so this is blind SSRF: an attacker can determine whether an internal service is reachable, but cannot read its response contents through this endpoint alone.
- Database specific
{ "cpes": [ "cpe:2.3:a:nextcloud:nextcloud:*:*:*:*:*:*:*:*" ], "severity": "Medium" }- References
Affected packages
Bitnami / nextcloud
Package
- Name
- nextcloud
- Purl
- pkg:bitnami/nextcloud
Severity
- 6.2 (Medium) CVSS_V3 - CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N CVSS Calculator