VulnSocial

CVE-2026-27707Disclosure(seerr / seerr)

LOWCVSS 9.8 · CRITICAL

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

Seerr is an open-source media request and discovery manager for Jellyfin, Plex, and Emby. Starting in version 2.0.0 and prior to version 3.1.0, an authentication guard logic flaw in `POST /api/v1/auth/jellyfin` allows an unauthenticated attacker to register a new Seerr account on any Plex-configured instance by authenticating with an attacker-controlled Jellyfin server. The attacker receives an authenticated session and can immediately use the application with default permissions, including the ability to submit media requests to Radarr/Sonarr. Any Seerr deployment where all three of the following are true may be vulnerable: `settings.main.mediaServerType` is set to `PLEX` (the most common deployment).; `settings.jellyfin.ip` is set to `""` (default, meaning Jellyfin was never configured); and `settings.main.newPlexLogin` is set to `true` (default). Jellyfin-configured and Emby-configured deployments are not affected. Version 3.1.0 of Seerr fixes this issue.

seerr CVEsBack to dashboard
0.0/ 10 priority

Sources & remediation

Patch / fix
Exploit / PoC references
Other references
Weakness type (CWE)
CWE-288CWE-807

Priority

LOW

Exploitation

NONE

PoC

YES

Patch

AVAILABLE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • seerr

Threat summary

  • 2 mentions across 2 observed days
  • Momentum state: stable

What's happening

  • Technical details provided in 1 signal
  • Disclosure: 2 classified signals
  • Peaked 1d ago at 1 mentions (2026-02-28); latest day: 1
  • 2 total mentions across 2 days

Affected systems

Vendors
seerr
Products
seerr

Deep dive

Activity timeline2 mentions / 2d
00111Mentions · 2026-02-28: 1Mentions · 2026-03-04: 1Technical Details · 2026-03-04: 102-2803-04
Signal classification1 categories
Disclosure
2100.0%
Referenced assets2 URLs
Full discourse2 posts
  • CRAC Learning - Tech@cracbot
    Disclosure

    CVE-2026-27707 (CVSS:7.3, HIGH) is Undergoing Analysis. Seerr is an open-source media request and discovery manager for Jellyfin, Plex, and Emby. Starting in version 2.0.0 and ..https://nvd.nist.gov/vuln/detail/CVE-2026-27707 #cybersecurityawareness #cybersecurity #CVE #infosec #hacker #nvd #mitre

    Post summary

    CVE-2026-27707 is identified with a high CVSS score and is currently under analysis; no PoC, exploit, or patch details are provided.

    0000057
    173 followersView on X
  • CVE@CVEnew
    Disclosure

    CVE-2026-27707 Seerr is an open-source media request and discovery manager for Jellyfin, Plex, and Emby. Starting in version 2.0.0 and prior to version 3.1.0, an authentication guar… https://www.cve.org/CVERecord?id=CVE-2026-27707

    Post summary

    CVE-2026-27707 is an authentication‑related vulnerability affecting Seerr versions 2.0.0 through 3.1.0, impacting media request and discovery for Jellyfin, Plex, and Emby.

    00000191
    56.6K followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Appseerrseerr---

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