CVE-2026-59258 immich-app CVE debrief

Who should care

Defenders responsible for immich installations, particularly those with shared album functionality, should assess exposure and prioritize patching or mitigation. Album owners and editors should be aware of the potential risks and take precautions to secure their albums.

Why it matters

CVE-2026-59258 is a high-severity vulnerability in immich that allows shared album editors to modify member roles, potentially enabling attackers to gain full control over albums. Defenders should prioritize verifying exposure and applying patches or mitigations.

• Potential for attackers to gain full control over shared albums
• Ability for attackers to demote album owners and promote themselves
• Possible impact on data integrity and confidentiality
• Need for defenders to verify exposure and apply patches

Technical summary

The immich application, prior to version 3.0.3, contains a broken access control vulnerability in the PUT /albums/:id/user/:userId endpoint. This allows shared album editors to modify member roles without owner-only restrictions, potentially enabling attackers with editor access to demote the album owner and promote themselves to gain full control, including deletion and eviction capabilities. The vulnerability has a CVSS score of 7.2 and is considered high-severity. Defenders should prioritize verifying exposure of immich installations to this vulnerability and apply patches or mitigations as available.

Defensive priority

Defenders should prioritize verifying exposure of immich installations to this vulnerability and apply patches or mitigations as available.

Recommended defensive actions

• Verify immich installations for exposure to this vulnerability
• Apply patches or updates to immich as available
• Restrict editor access to shared albums
• Monitor for suspicious activity on immich instances
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, including its CVSS score of 7.2 and the affected endpoint PUT /albums/:id/user/:userId. However, specific details about exploitation or victim impact are not provided.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.