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TI-2026-22147 Aliases CVE-2026-27793

Seerr has Broken Object-Level Authorization in User Profile Endpoint that Exposes Third-Party Notification Credentials

Priority LOW 28CWE-639Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-639.

Summary

Seerr is an open-source media request and discovery manager for Jellyfin, Plex, and Emby. Prior to version 3.1.0, the `GET /api/v1/user/:id` endpoint returns the full settings object for any user, including Pushover, Pushbullet, and Telegram credentials, to any authenticated requester regardless of their privilege level. This vulnerability can be exploited alone or combined with the reported unauthenticated account creation vulnerability, CVE-2026-27707. When combined, the two vulnerabilities create a zero-prior-access chain that leaks third-party API credentials for all users, including administrators. Version 3.1.0 contains a fix for both this vulnerability and for CVE-2026-27707.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00268 19th percentileScored 2026-11-07
Fix Fixed seerr (seerr-team): 3.1.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
seerr-teamseerrbefore 3.1.03.1.0Patch availableCNA
  • seerr Vendorseerr-team Affected before 3.1.0 Fixed in 3.1.0 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:seerr:seerr:*:*:*:*:*:*:*:*before 3.1.0Vulnerableseerr-team
  • cpe:2.3:a:seerr:seerr:*:*:*:*:*:*:*:* Versions before 3.1.0 Vulnerable ·seerr-team

Remediation

  • Fix · CNA seerr (seerr-team) Fixed in 3.1.0

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-27793

References

Patch 1

Advisory 1

Other 1

  • TI-2026-22083 Plex-configured Seerr instances vulnerable to unauthenticated account registration via Jellyfin authentication endpoint CVSS 3.1CRITICAL 9.8
  • TI-2026-22146 Seerr missing authentication on pushSubscription endpoints CVSS 3.1MEDIUM 5.4

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences