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CVE-2026-41256

jq: Embedded NUL truncates top-level jq programs loaded with -f

Published: 5/11/2026 Last updated: 5/11/2026 Reserved: 4/18/2026

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.

CNA assigner: GitHub_M (a0819718-46f1-4df5-94e2-005712e83aaa) Requested by: n/a

Metrics

Version Score Severity Vector String
3.1 5.5 Medium CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Opam packages affected (2)

conf-jq travis-opam

Products affected (1)

Product Vendor Version
jq jqlang 8.5.7.CF201609

References (2)