CVE catalog
CVE-2026-45691
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 p
- Severity
- Medium · CVSS 6.8
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.29% · Oct 25, 2026
A flaw was found in Nextcloud Server. An attacker could reuse a pre-two-factor authentication (2FA) session cookie as a Bearer token. This allows them to authenticate against DAV endpoints, granting unauthorized read and write access and bypassing the mandatory two-factor authentication. Red Hat Product Security has determined that this vulnerability does not affect any currently supported Red Hat product. This assessment may evolve based on further analysis and discovery. For more information about this vulnerability and the products it affects, please see the linked references. The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Cpe | nextcloud_server | Not reported | 32.0.9 | fixed |
| Cpe | nextcloud_server | Not reported | 33.0.3 | fixed |
| Cpe | nextcloud_server | Not reported | 29.0.16.16 | fixed |
| Cpe | nextcloud_server | Not reported | 30.0.17.9 | fixed |
| Cpe | nextcloud_server | Not reported | 31.0.14.5 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Cpe | nextcloud_server | cpe | Not reported | 32.0.9 | Not reported | Not reported | Not reported |
| Cpe | nextcloud_server | cpe | Not reported | 33.0.3 | Not reported | Not reported | Not reported |
| Cpe | nextcloud_server | cpe | Not reported | 29.0.16.16 | Not reported | Not reported | Not reported |
| Cpe | nextcloud_server | cpe | Not reported | 30.0.17.9 | Not reported | Not reported | Not reported |
| Cpe | nextcloud_server | cpe | Not reported | 31.0.14.5 | Not reported | Not reported | Not reported |
OpenFactory catalog packages
No matching packages in this catalog.
Observed:
References
- [https://nvd.nist.gov/vuln/detail/CVE-2026-45691]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-45691.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-1517.json]
[CERT-Bund public advisories] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [Red Hat security advisories and VEX]