CVE-2026-115932

When a post is published, Postiz treats a media path that is not a web address as a file on the server's disk, but it does not check that the file lies inside the upload directory. A registered user can store a crafted media path with a post, get it past the checks that normally restrict it, and have the publishing worker read an arbitrary file and send it as an attachment to a Discord server the user controls. The same unconfined reads can be reached through two further routes. One tells the caller whether a file exists and can exhaust the backend's memory, the other delivers the file the same way as the main route. Self-registration is open by default, so the attacker needs no existing account.

CVSS v3 9.6 CRITICAL

9.6^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.1 / Impact : 5.8

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://gadvisory.org/advisories/PSA-2026-E9AHFV
https://github.com/gitroomhq/postiz-app
https://github.com/gitroomhq/postiz-app/commit/12db9bd2f428b628a62809669c3d76297e07750a
https://github.com/gitroomhq/postiz-app/releases/tag/v2.25.3

Configurations

No configuration.

History

24 Oct 2026, 13:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-24 13:16

Updated : 2026-10-26 16:54

NVD link : CVE-2026-115932

Mitre link : CVE-2026-115932

CVE.ORG link : CVE-2026-115932

JSON object : View

Products Affected

No product.

CWE

CWE-22

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CWE-74

Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

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