roziscoding jack up to 0.0.x Error handle-error.ts information disclosure

Summaryinfo

A vulnerability was found in roziscoding jack up to 0.0.x and classified as problematic. Impacted is an unknown function of the file middleware/handle-error.ts of the component Error Handler. Executing a manipulation can lead to information disclosure. This vulnerability is tracked as CVE-2026-62979. The attack can be launched remotely. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability has been found in roziscoding jack up to 0.0.x and classified as problematic. This vulnerability affects an unknown code of the file middleware/handle-error.ts of the component Error Handler. The manipulation with an unknown input leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality. CVE summarizes:

jack lets users share media libraries through their Radarr/Sonarr stack, peer-to-peer. Prior to 0.1.0, `middleware/handle-error.ts` serializes raw `FetchError` objects into HTTP responses. `lib/servers/base.ts` attaches outbound request headers on upstream non-success responses and schema-validation failures; the public `extras` field in `lib/errors/FetchError.ts` remains enumerable and is emitted by JSON serialization. These headers include the internal Radarr/Sonarr `X-Api-Key` and custom connector headers such as `CF-Access-Client-Secret`. `lib/redact.ts` redacts logs and spans but not this response path. Any client with the shared peer API key, plus Cloudflare Access credentials if required by the deployment, can force an error without a race or user interaction. `GET /peer/items/:id` and `GET /servers/health` can expose the internal media-server key, while `GET /torznab/download/:id` can expose another peer's key and Cloudflare Access secrets. The /peer/search and /items routes catch these errors and are not affected. Disclosed internal keys grant full administrative control of the corresponding Radarr/Sonarr instance, crossing the intended boundary between friends' shared peer access and private backend credentials. This issue is fixed in version 0.1.0.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-62979 since 07/15/2026. The exploitation appears to be easy. The attack can be initiated remotely. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1592.

Upgrading to version 0.1.0 eliminates this vulnerability.

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Productinfo

Vendor

• roziscoding

Name

• jack

Version

• 0.0

Website

• Product: https://github.com/roziscoding/jack/

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