CVE-2026-41256: Jqlang Jq

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

jq is a command-line JSON processor. In 1.8.1 and earlier, Top-level jq programs loaded from a file with -f are truncated at the first embedded NUL byte on current upstream HEAD. A crafted filter file such as . followed by \x00 and arbitrary suffix compiles and executes as only the prefix before the NUL. This leaves jq with a post-CVE-2026-33948 prefix/full-buffer mismatch on the compilation path even though the JSON parser path has already been fixed.

Affected products

• Jqlang Jq: up to and including 1.8.1

Published 2026-05-11. Last modified 2026-06-17.