CVE-2026-115932
CRITICAL
9,6
Source: 4cdc9741-f887-419a-a2fd-acbbd2729276
Attack Vector: network
Attack Complexity: low
Privileges Required: low
User Interaction: none
Scope: changed
Confidentiality: high
Integrity: high
Availability: none
Description
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.
22
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
StableCommon Consequences
Security Scopes Affected:
Integrity
Confidentiality
Availability
Potential Impacts:
Execute Unauthorized Code Or Commands
Modify Files Or Directories
Read Files Or Directories
Dos: Crash, Exit, Or Restart
Applicable Platforms
Technologies:
AI/ML
74
Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
IncompleteCommon Consequences
Security Scopes Affected:
Confidentiality
Access Control
Other
Integrity
Non-Repudiation
Potential Impacts:
Read Application Data
Bypass Protection Mechanism
Alter Execution Logic
Other
Hide Activities
Applicable Platforms
All platforms may be affected
https://gadvisory.org/advisories/PSA-2026-E9AHFV
https://github.com/gitroomhq/postiz-app
https://github.com/gitroomhq/postiz-app/commit/12db9bd2f428b628a62809669c3d7629…
https://github.com/gitroomhq/postiz-app/releases/tag/v2.25.3