[SECURITY] Fedora 45 Update: nextcloud-34.0.4-1.fc45

NextCloud gives you universal access to your files through a web interface or WebDAV. It also provides a platform to easily view & sync your contacts, calendars and bookmarks across all your devices and enables basic editing rig ht on the web. NextCloud is extendable via a simple but powerful API...

Fedora 44 : nextcloud (2026-362f1943c8)

The remote Fedora 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-362f1943c8 advisory. 34.0.4 Release Tenable has extracted the preceding description block directly from the Fedora security advisory. Note that Nessus has not tested for...

Fedora 45 : nextcloud (2026-5c1bbb46c3)

The remote Fedora 45 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-5c1bbb46c3 advisory. 34.0.4 Release Tenable has extracted the preceding description block directly from the Fedora security advisory. Note that Nessus has not tested for...

Fedora 43 : nextcloud (2026-c495e95154)

The remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-c495e95154 advisory. 34.0.4 Release Tenable has extracted the preceding description block directly from the Fedora security advisory. Note that Nessus has not tested for...

BIT-NEXTCLOUD-2026-82985

The Photos app's filter-based "smart albums" build their file listing using the search configuration photosSourceFolders of the user viewing the album, rather than the album owner's configuration. When an album owner shares a smart album with another user, that user's own folder configuration is...

BIT-NEXTCLOUD-2026-77164

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...

BIT-NEXTCLOUD-2026-68493

After guessing a 62^15 complex unique identifier, a malicious logged in user was able to retrieve a list of memberships for a circle they are not a member of...

PT-2026-98999

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...

SUSE CVE-2026-77164

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...

CVE-2026-68493

A flaw was found in Nextcloud. A malicious logged-in user could potentially guess a highly complex unique identifier. This guessing could allow the user to retrieve a list of memberships for a circle they are not authorized to access, leading to information disclosure...

CVE-2026-77164

A flaw was found in Nextcloud. An unauthenticated remote attacker can exploit a Server-Side Request Forgery SSRF vulnerability in the Circles component. By sending a specially crafted request to the public endpoints, the attacker can force the server to make GET requests to internal network...

CVE-2026-77165

creationtimestamp| type| source ---|---|--- 2026-09-22 12:15:04+00:00| seen| https://www.acn.gov.it/portale/w/nextcloud-poc-pubblica-per-lo-sfruttamento-della-cve-2026-77165 2026-09-23 01:00:43+00:00| seen|...

CVE-2026-77164

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...

CVE-2026-77164

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...

CVE-2026-77164

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...

EUVD-2026-82621

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...

CVE-2026-77164

CVE-2026-77164 is a blind SSRF in Nextcloud's Circles app. During remote-instance signature verification, the server fetches an attacker-supplied keyId URL before trust is established and explicitly permits local/private addresses, bypassing Nextcloud's core SSRF protections. The vulnerable code ...

CVE-2026-77164: Server-Side Request Forgery (SSRF)

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...

nextcloud-mcp-server: Unauthenticated `POST /webhooks/nextcloud` allows arbitrary vector data deletion when `WEBHOOK_SECRET` is unset ( default )

SummaryThe POST /webhooks/nextcloud endpoint has no authentication by default: WEBHOOKSECRET defaults to None and is never required by startup validation. When unset, the receiver accepts any unauthenticated POST. The userid is taken directly from the attacker-supplied payload and passed to Qdran...

PYSEC-2026-3866 nextcloud-mcp-server: Unauthenticated `POST /webhooks/nextcloud` allows arbitrary vector data deletion when `WEBHOOK_SECRET` is unset ( default )

Summary The POST /webhooks/nextcloud endpoint has no authentication by default: WEBHOOKSECRET defaults to None and is never required by startup validation. When unset, the receiver accepts any unauthenticated POST. The userid is taken directly from the attacker-supplied payload and passed to...