CVE-2026-45157
Nextcloud: Valid share tokens allow to access tempory upload files of share owner
Description
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, when a malicious user has access to a file share of a user, they could use this share token to also access the chunking upload directly and see temporary part files during on going uploads. It is recommended that the Nextcloud Server is upgraded to 32.0.9 or 33.0.3. It is recommended that the Nextcloud Enterprise Server is upgraded to 26.0.13.26, 27.1.11.25, 28.0.14.17, 29.0.16.16, 30.0.17.9, 31.0.14.5, 32.0.9 or 33.0.3
INFO
Published Date :
June 1, 2026, 5:17 p.m.
Last Modified :
July 22, 2026, 7:10 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Upgrade Nextcloud Server to 32.0.9 or 33.0.3.
- Upgrade Nextcloud Enterprise Server to specified versions.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-45157.
| URL | Resource |
|---|---|
| https://github.com/nextcloud/security-advisories/security/advisories/GHSA-45pj-p7x7-4mhc | |
| https://github.com/nextcloud/server/pull/59780 | |
| https://hackerone.com/reports/3483708 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-45157 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-45157
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-45157 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-45157 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Jul. 22, 2026
Action Type Old Value New Value Added Translation Title: security-advisories de nextcloud, Description: Nextcloud es una plataforma de colaboración de contenido de código abierto. En Nextcloud Servidor, desde las versiones 32.0.0 hasta antes de la 32.0.9, y de la 33.0.0 hasta antes de la 33.0.3, cuando un usuario malicioso tiene acceso a un recurso compartido de archivos de un usuario, podría usar este token de recurso compartido para también acceder directamente a la carga por fragmentos y ver archivos de parte temporales durante las cargas en curso. Se recomienda que el Nextcloud Servidor se actualice a la 32.0.9 o a la 33.0.3. Se recomienda que el Nextcloud Enterprise Servidor se actualice a la 26.0.13.26, 27.1.11.25, 28.0.14.17, 29.0.16.16, 30.0.17.9, 31.0.14.5, 32.0.9 o a la 33.0.3. -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'nextcloud', 'product': 'security-advisories', 'versions': [{'status': 'affected', 'version': '>= 32.0.0, < 32.0.9'}, {'status': 'affected', 'version': '>= 33.0.0, < 33.0.3'}]}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-45157', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-06-01T18:49:11.015107Z'} -
New CVE Received by [email protected]
Jun. 01, 2026
Action Type Old Value New Value Added Description 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, when a malicious user has access to a file share of a user, they could use this share token to also access the chunking upload directly and see temporary part files during on going uploads. It is recommended that the Nextcloud Server is upgraded to 32.0.9 or 33.0.3. It is recommended that the Nextcloud Enterprise Server is upgraded to 26.0.13.26, 27.1.11.25, 28.0.14.17, 29.0.16.16, 30.0.17.9, 31.0.14.5, 32.0.9 or 33.0.3 Added CVSS V3.1 AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:N Added CWE CWE-284 Added Reference https://github.com/nextcloud/security-advisories/security/advisories/GHSA-45pj-p7x7-4mhc Added Reference https://github.com/nextcloud/server/pull/59780 Added Reference https://hackerone.com/reports/3483708