---
title: "CVE-2026-62979: jack - Information Disclosure"
description: "jack before 0.1.0 contains an information disclosure caused by serialization of internal Radarr/Sonarr API keys and Cloudflare Access secrets in error responses, letting clients with shared peer API keys access sensitive credentials without user interaction."
url: https://panop.io/threat-heartbeat/CVE-2026-62979/
---

# CVE-2026-62979 jack - Information Disclosure

jack before 0.1.0 contains an information disclosure caused by serialization of internal Radarr/Sonarr API keys and Cloudflare Access secrets in error responses, letting clients with shared peer API keys access sensitive credentials without user interaction.

CVSS base score 8.4 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.36% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-62979)

## Details

Type

Information Disclosure

Impact

Information Disclosure

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Published

30 October 2026

Updated

1 November 2026

Weakness

[CWE-200](https://cwe.mitre.org/data/definitions/200.html)

## Vendor fix

Update to version 0.1.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-62979](https://nvd.nist.gov/vuln/detail/CVE-2026-62979)
- [https://github.com/roziscoding/jack/commit/2b296b5137acca476f34a23b692dd8c04ae1f148](https://github.com/roziscoding/jack/commit/2b296b5137acca476f34a23b692dd8c04ae1f148)
- [https://github.com/roziscoding/jack/releases/tag/v0.1.0](https://github.com/roziscoding/jack/releases/tag/v0.1.0)
- [https://github.com/roziscoding/jack/security/advisories/GHSA-8gw5-7585-4997](https://github.com/roziscoding/jack/security/advisories/GHSA-8gw5-7585-4997)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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