sct Overseerr up to 1.35.0 Push Subscription API userId authorization

Summaryinfo

A vulnerability classified as critical has been found in sct Overseerr up to 1.35.0. This vulnerability affects unknown code of the component Push Subscription API. This manipulation of the argument userId causes authorization. This vulnerability only affects products that are no longer supported by the maintainer. The identification of this vulnerability is CVE-2026-65696. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in sct Overseerr up to 1.35.0. It has been declared as critical. Affected by this vulnerability is some unknown processing of the component Push Subscription API. The manipulation of the argument userId with an unknown input leads to a authorization vulnerability. The CWE definition for the vulnerability is CWE-639. The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Overseerr through 1.35.0 contains an authorization bypass through user-controlled key vulnerability in the push subscription API that allows authenticated users to list, read, and delete any other user's push subscriptions by supplying an arbitrary userId in the path parameters. Attackers can exploit the missing ownership check in the affected handlers to access target user records without the filteredFields filter, leaking sensitive data including email addresses and plexId values.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-65696 since 07/22/2026. The exploitation appears to be easy. The attack can be launched remotely. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/23/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• sct

Name

• Overseerr

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 1.9
• 1.10
• 1.11
• 1.12
• 1.13
• 1.14
• 1.15
• 1.16
• 1.17
• 1.18
• 1.19
• 1.20
• 1.21
• 1.22
• 1.23
• 1.24
• 1.25
• 1.26
• 1.27
• 1.28
• 1.29
• 1.30
• 1.31
• 1.32
• 1.33
• 1.34
• 1.35.0

Support

• end of life

CPE 2.3info

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CPE 2.2info

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