Authorization Bypass in Overseerr Affects User Record Confidentiality
CVE-2026-65696

5.3MEDIUM

Key Information:

Vendor

Sct

Status
Overseerr
Vendor
CVE Published:
23 July 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-65696?

Overseerr version 1.35.0 contains a significant vulnerability within its push subscription API that allows authenticated users to bypass authorization controls. By manipulating the userId in the API path, attackers can illicitly list, view, and delete push subscriptions belonging to other users. This exploit occurs due to a lack of ownership verification in the affected API handlers, which means sensitive information—such as email addresses and plexId values—can be accessed without any restrictions. Consequently, this flaw poses a serious risk to user data integrity and confidentiality.

Affected Version(s)

overseerr 0 <= 1.35.0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-65696 - Proof of Concept

References

https://github.com/geo-chen/oss/blob/main/overseerr.md
technical-descriptionexploit
https://www.vulncheck.com/advisories/overseerr-authorizat...
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

George Chen
.