CVE-2026-45691Nextcloud is an open source content collaboration platform.
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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 TOTP completion) could be reused as a Bearer token to authenticate against DAV endpoints, granting read/write access and bypassing mandatory two-factor authentication. 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
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-mp6x-g55j-w9jwvendor-advisory
- https://github.com/nextcloud/server/pull/59758issue-tracking, patch
- https://hackerone.com/reports/3573399permissions-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.