CVE-2026-119330 in Immich
Summary
by MITRE • 10/30/2026
Immich is a high-performance self-hosted photo and video management solution. Prior to 3.2.0, the shared-link creation API accepted albumId and assetIds as independent fields in server/src/services/shared-link.service.ts but authorized only the resource selected by the requested link type. An authenticated attacker who already knew a victim-owned asset UUID could select SharedLinkType.Album for an attacker-owned album while supplying that UUID in assetIds; SharedLinkService.create() persisted the unchecked association in shared_link_asset and made the victim asset available through the new anonymous shared-link credential. This exposed victim metadata, thumbnails, and the byte-identical original file and created a persistent sharing relationship that could be redistributed. This issue is fixed in version 3.2.0.
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Analysis
by VulDB Data Team • 10/30/2026
Immich serves as a high-performance self-hosted solution for photo and video management, offering users robust tools to organize and share media assets securely. However, prior to the release of version 3.2.0, the application contained a critical authorization flaw within its shared-link creation API that allowed authenticated attackers to bypass intended access controls. This vulnerability stemmed from an improper separation between resource selection logic and permission validation in the server-side service responsible for managing shared links. Specifically, the endpoint accepted albumId and assetIds as independent fields without enforcing strict consistency checks between them during the link generation process.
The technical flaw resides in the SharedLinkService.create() method located within src/services/shared-link.service.ts. When a user requested to create a new shared link, they could specify a SharedLinkType of Album while simultaneously providing an assetId that belonged to a different album or resource owned by another user. The system failed to verify whether the specified assetIds were actually contained within the referenced albumId before persisting the association in the database table named shared_link_asset. Consequently, if an attacker possessed knowledge of a victim-owned asset UUID, they could craft a request linking that specific asset to their own album-based link structure. This unchecked association resulted in the creation of a persistent sharing relationship where the victim's media became accessible via the newly created anonymous credential.
The operational impact of this vulnerability is significant for user privacy and data integrity. An authenticated attacker who successfully exploited this flaw could expose sensitive metadata, high-resolution thumbnails, and byte-identical copies of original files belonging to other users. Because the shared link was generated through a legitimate API endpoint with valid authentication credentials, it bypassed standard anonymous access restrictions designed to protect private content. Furthermore, since the sharing relationship persisted in the database, the attacker could distribute these unauthorized links externally, leading to widespread exposure of personal media without the knowledge or consent of the asset owners. This represents a clear case of broken object level authorization where the application failed to enforce proper ownership checks on associated resources.
From a classification perspective, this vulnerability aligns with CWE-269 Improper Privilege Management and CWE-862 Missing Authorization, as the system allowed an authenticated user to perform actions that exceeded their intended permissions regarding other users' data. In terms of attack vectors, it corresponds to MITRE ATT&CK techniques related to Account Manipulation or Data Exfiltration via Shared Links, specifically leveraging valid credentials to access unauthorized resources. The exploitation requires prior knowledge of a victim's asset UUID, which may be obtained through enumeration attacks or information leakage from other parts of the application interface.
To mitigate this risk and prevent similar issues in future development, it is essential that all API endpoints performing resource associations implement rigorous validation logic. Developers must ensure that when creating shared links involving multiple identifiers such as albumId and assetIds, the system explicitly verifies that every requested asset belongs to the specified container or context before persisting any database records. Input validation should not only check for format correctness but also enforce semantic consistency between related parameters. Additionally implementing comprehensive logging of link creation events can aid in detecting anomalous patterns indicative of exploitation attempts. Users running versions prior to 3.2.0 are strongly advised to upgrade immediately as this issue has been resolved in the latest release through stricter authorization checks during shared-link generation.