nextcloud has 41 CVEs on record between 2025 and 2026. Disclosure cadence is accelerating: 18 in the last 90 days against 10 in the 90 before. The busiest recent month was December 2025 with 13. The median CVSS is 4.3 (medium). None have a confirmed exploitation report. The dominant weakness classes are CWE-284 (11) and CWE-639 (8). Most affected products: Tables (8), Server (7), nextcloud_server (5).
CVEs per month
Last 12 months, by publish date
- Exploited share
- 0% vs 1% corpus
- Median CVSS
- 4.3
- Publish → KEV
- —
- Last 90 days
- 18 prev 10
Weakness classes
Products
- Tables 8
- Server 7
- nextcloud_server 5
- Deck 3
- Approval 2
- Collectives 2
Worst active — by depth score
CVE-2026-77165Medium· 6.5File owners were unable to unlock TYPE_TOKEN locks placed by other users, leaving files permanently locked with no recovery path outside of the database.48CVE-2026-45545High· 8.2Nextcloud is an open source content collaboration platform45CVE-2026-77167High· 7.5Abusing the federated share endpoint, an attacker can write arbitrary rows into the oc_share_external database table41CVE-2026-45722High· 7.1Nextcloud is an open source content collaboration platform39CVE-2026-45810Medium· 6.8Nextcloud is an open source content collaboration platform37
nextcloud vulnerabilities
CVEs affecting nextcloud, newest first. Open any entry for full detail, references, and exploit status.
41 CVEsRSS
CVE-2026-82986Medium· 4.6The user in a group can bypass the group restriction set by an administrator on link sharing, creating share links for a table even though they shouldn't have that permission.
The user in a group can bypass the group restriction set by an administrator on link sharing, creating share links for a table even though they shouldn't have that permission.
CVE-2026-87897Medium· 4.6A SSRF vulnerability found that enables access to internal Chrome Devtools Protocol APIs that can leak the JWT authentication token for another user
A SSRF vulnerability found that enables access to internal Chrome Devtools Protocol APIs that can leak the JWT authentication token for another user. A low privileged attacker could continually exploit this vulnerability to leak the JWT …
CVE-2026-82983Low· 3.3The Tables app's share-listing endpoint (GET /apps/tables/share/table/{tableId}) did not verify that the requesting user has manage-level permission on the table before returning the full list of share recipients (users, groups, and team…
The Tables app's share-listing endpoint (GET /apps/tables/share/table/{tableId}) did not verify that the requesting user has manage-level permission on the table before returning the full list of share recipients (users, groups, and team…
CVE-2026-77171Low· 3.5A public shared collective always allowed recipients of the link to create pages.
A public shared collective always allowed recipients of the link to create pages.
CVE-2026-77173Medium· 4.3A user could create a docx or odt file with a # in the filename with confidential information such as a credit card number and have it not be marked as confidential.
A user could create a docx or odt file with a # in the filename with confidential information such as a credit card number and have it not be marked as confidential.
CVE-2026-77167High· 7.5Abusing the federated share endpoint, an attacker can write arbitrary rows into the oc_share_external database table
Abusing the federated share endpoint, an attacker can write arbitrary rows into the oc_share_external database table. These rows persist indefinitely — there is no automatic cleanup mechanism. Three distinct denial-of-service conditions …
CVE-2026-77172Medium· 5.3App passwords were allowed to bypass password confirmation on sensitive endpoints.
App passwords were allowed to bypass password confirmation on sensitive endpoints.
CVE-2026-67400Low· 3.5A missing token type check allowed to retrieve more additional information about the WOPI configuration with a user or guest token.
A missing token type check allowed to retrieve more additional information about the WOPI configuration with a user or guest token.
CVE-2026-82984Medium· 4.3When a team was configured as "visible to everyone", the web UI correctly blocked non-members from viewing the team ("You are not a member of ..."), but the resources API endpoint could still be called directly, allowing any authenticate…
When a team was configured as "visible to everyone", the web UI correctly blocked non-members from viewing the team ("You are not a member of ..."), but the resources API endpoint could still be called directly, allowing any authenticate…
CVE-2026-77166Low· 2.4PoCThe emoji field in the page emoji update endpoint does not properly validate user input
The emoji field in the page emoji update endpoint does not properly validate user input. By injecting long text and line breaks, the sidebar layout becomes broken and can hide other items.
CVE-2026-77165Medium· 6.5PoCFile owners were unable to unlock TYPE_TOKEN locks placed by other users, leaving files permanently locked with no recovery path outside of the database.
File owners were unable to unlock TYPE_TOKEN locks placed by other users, leaving files permanently locked with no recovery path outside of the database.
CVE-2026-77169Medium· 6.5A vulnerability in the team folders (formerly group folders) app when used in combination with the workspace app allowed API/REST-only delegated administrators to bypass folder-level authorization controls
A vulnerability in the team folders (formerly group folders) app when used in combination with the workspace app allowed API/REST-only delegated administrators to bypass folder-level authorization controls. The workspace app enables orga…
CVE-2026-68493Low· 3.1After 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.
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.
CVE-2026-82982Medium· 4.3The Approval app's approve/reject endpoint is meant to require the file's current etag as a freshness check, preventing an approver from approving or rejecting a file whose contents changed after they reviewed it
The Approval app's approve/reject endpoint is meant to require the file's current etag as a freshness check, preventing an approver from approving or rejecting a file whose contents changed after they reviewed it. The backend only enforc…
CVE-2026-77170Medium· 4.3The Deck config API allows authenticated users to set board-scoped configuration keys for arbitrary board IDs without validating whether the user owns or has permission to manage the referenced board.
The Deck config API allows authenticated users to set board-scoped configuration keys for arbitrary board IDs without validating whether the user owns or has permission to manage the referenced board.
CVE-2026-82985Medium· 6.5The 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
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 alb…
CVE-2026-82980Medium· 6.3Any authenticated user can lock or unlock files they do not own by targeting absolute WebDAV paths of other users
Any authenticated user can lock or unlock files they do not own by targeting absolute WebDAV paths of other users. The DAV plugin resolves files from the absolute request URI without verifying that the path segment matches the authentica…
CVE-2026-77164Medium· 6.2Circles' 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 p…
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 p…
CVE-2026-45810Medium· 6.8Nextcloud is an open source content collaboration platform
Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 31.0.0 to before 31.0.12, and 32.0.0 to before 32.0.3, a missing check of a relation allowed authenticated users with access to any file commen…
CVE-2026-45722High· 7.1Nextcloud is an open source content collaboration platform
Nextcloud is an open source content collaboration platform. From versions 0.9.0 to before 0.9.7, and 1.0.0 to before 1.0.2, a missing sanitization in the Tables app allowed a user with access to the tables app to perform a limited SQL in…
CVE-2026-45691Medium· 5.9Nextcloud is an open source content collaboration platform
Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 32.0.0 to before 32.0.9, and 33.0.0 to before 33.0.3, a pre-2FA session cookie (created after successful password authentication but before TOT…
CVE-2026-45690Medium· 5.9Nextcloud is an open source content collaboration platform
Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 32.0.0 to before 32.0.9, and 33.0.0 to before 33.0.3, an authentication bypass vulnerability allowed attackers with knowledge of a user's passw…
CVE-2026-45545High· 8.2Nextcloud is an open source content collaboration platform
Nextcloud is an open source content collaboration platform. From versions 0.7.0 to before 0.7.7, 0.8.0 to before 0.8.10, 0.9.0 to before 0.9.8, and 1.0.0 to before 1.0.4, an authenticated attacker with access to the Tables app may be abl…
CVE-2026-45544Medium· 4.3Nextcloud is an open source content collaboration platform
Nextcloud is an open source content collaboration platform. From version 0.8.0 to before version 1.0.4, the view filter criteria is exposed to users with read-only permissions in Nextcloud Tables. This issue has been patched in versions …
CVE-2026-45543Medium· 5.3Nextcloud is an open source content collaboration platform
Nextcloud is an open source content collaboration platform. From version 4.3.0 to before version 5.2.7, a removed collaborator retains unauthorized read access to uploaded respondent files for the affected form. The scope is limited to u…
CVE-2026-45286Medium· 4.3Nextcloud is an open source content collaboration platform
Nextcloud is an open source content collaboration platform. From versions 5.5.13 to before 5.5.17, and 6.2.0 to before 6.2.3, an authenticated user can enumerate users on the same Nextcloud instance by using the Calendar app's endpoint f…
CVE-2026-45285Medium· 6.4Nextcloud is an open source content collaboration platform
Nextcloud is an open source content collaboration platform. From versions 32.0.0 to before 32.0.9, and 33.0.0 to before 33.0.3, when a user shares a folder or file with a Nextcloud Team that includes an external member (a person added vi…
CVE-2026-45284Medium· 4.6Nextcloud is an open source content collaboration platform
Nextcloud is an open source content collaboration platform. From version 1.3.6 to before version 8.4.0, an improper check allowed users that where provided by LDAP to still authenticate towards user OIDC after they where deleted. This is…
CVE-2025-64011Medium· 4.3Nextcloud Server 30.0.0 is vulnerable to an Insecure Direct Object Reference (IDOR) in the /core/preview endpoint
Nextcloud Server 30.0.0 is vulnerable to an Insecure Direct Object Reference (IDOR) in the /core/preview endpoint. Any authenticated user can access previews of arbitrary files belonging to other users by manipulating the fileId paramete…
CVE-2025-66558Low· 3.1Nextcloud Twofactor WebAuthn is the WebAuthn Two-Factor Provider for Nextcloud
Nextcloud Twofactor WebAuthn is the WebAuthn Two-Factor Provider for Nextcloud. Prior to 1.4.2 and 2.4.1, a missing ownership check allowed an attack to take-away a 2FA webauthn device when correctly guessing a 80-128 character long rand…