CVE-2026-39956: jq: Missing runtime type checks for _strindices lead to crash and limited memory disclosure

Overview

Severity

Medium (CVSS 6.1)

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H

Exploit Status

Not Exploited

Patch Tuesday

2026-Apr

Released

2026-04-17

Last Updated

2026-04-24

EPSS Score

0.17% (percentile: 7.1%)

Affected Products (2)

Open Source Software

• cbl2 jq 1.6-5 on CBL Mariner 2.0

Mariner

• azl3 jq 1.7.1-4 on Azure Linux 3.0

Revision History

• 2026-04-17: Information published.
• 2026-04-18: Information published.
• 2026-04-24: Information published.