Medium 5.9Published Jun 1, 2026

CVE-2026-45690Nextcloud is an open source content collaboration platform.

Updated under an hour ago (2026-10-19 06:10 UTC)

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It affects nextcloud_server. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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 password to circumvent two-factor authentication (2FA) protections. When a user initiated login with valid credentials on a 2FA-enabled account, the system created a temporary session token before enforcing the second factor challenge. This token could be extracted and replayed via HTTP Basic Authentication to gain unauthorized access to authenticated endpoints. It is recommended that the Nextcloud Server is upgraded to 33.0.3 or 32.0.9. It is recommended that the Nextcloud Enterprise Server is upgraded to 33.0.3, 32.0.9, 31.0.14.5, 30.0.17.9 or 29.0.16.16

CVSS: 5.9 MEDIUM (v3.1, NVD)CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:N
Weakness (CWE): CWE-287
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Analyzed
Record last updated: Jul 22, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

nextcloud nextcloud_server nextcloud:nextcloud_server	from 32.0.0 before 32.0.9; from 33.0.0 before 33.0.3; from 29.0.0 before 29.0.16.16; from 30.0.0 before 30.0.17.9; from 31.0.0 before 31.0.14.5; from 32.0.0 before 32.0.9; from 33.0.0 before 33.0.3	NVD

References

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-jgcj-v42r-9922vendor-advisory
https://github.com/nextcloud/server/pull/59758issue-tracking, patch
https://hackerone.com/reports/3639301permissions-required

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.