CVE-2026-116136: ProjectSend 2.0.0 through 2.7.1 Incorrect Authorization via File Version Linking

Severity: medium (CVSS 5.9 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: 2026-10-25 · updated 2026-10-29
Weakness: CWE-863

Description

ProjectSend 2.0.0 through 2.7.1 contains an incomplete authorization vulnerability in FileVersions::link() that allows staff users to share files without authorization by linking file versions. Attackers can link their file onto an intermediate revision or assign out-of-scope clients, causing moveAssignmentsToRoot() to expose protected original files to unauthorized clients.

Affected products

ProjectSend: from 2.0.0 through 2.7.1

References

https://github.com/projectsend/projectsend
https://github.com/projectsend/projectsend/blob/v2.7.1/app/Modules/Files/Versions/FileVersions.php#L456-L467
https://github.com/projectsend/projectsend/blob/v2.7.1/app/Modules/Files/Versions/FileVersions.php#L534-L575
https://github.com/projectsend/projectsend/commit/a6ce4f51cfd05e1c9895f8daed261ef1fdfd194d
https://www.vulncheck.com/advisories/projectsend-2.0.0-through-2.7.1-incorrect-authorization-via-file-version-linking

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