What’s Vulnerable › Vulnerabilities

CVE-2026-45157: Nextcloud: Valid share tokens allow to access tempory upload files of share owner

• Severity: medium (CVSS 6.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-01 · updated 2026-07-22
• Weakness: CWE-284

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

Affected products

• nextcloud security-advisories: from 32.0.0, < 32.0.9; from 33.0.0, < 33.0.3

References

• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-45pj-p7x7-4mhc
• https://github.com/nextcloud/server/pull/59780
• https://hackerone.com/reports/3483708

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