CVE-2026-62979

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.

CVSS

No CVSS.

References

Link	Resource
https://github.com/roziscoding/jack/commit/2b296b5137acca476f34a23b692dd8c04ae1f148
https://github.com/roziscoding/jack/releases/tag/v0.1.0
https://github.com/roziscoding/jack/security/advisories/GHSA-8gw5-7585-4997

Configurations

No configuration.

History

30 Oct 2026, 21:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-30 21:17

Updated : 2026-10-30 23:17

NVD link : CVE-2026-62979

Mitre link : CVE-2026-62979

CVE.ORG link : CVE-2026-62979

JSON object : View

Products Affected

No product.

CWE

CWE-200

Exposure of Sensitive Information to an Unauthorized Actor

CWE-209

Generation of Error Message Containing Sensitive Information

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