CVE-2026-41256
jq: Embedded NUL truncates top-level jq programs loaded with -f
- State
- Published
- Severity
- 5.5 Medium
- Published
- May 11, 2026
- Updated
- Jun 23, 2026
- Reserved
- Apr 18, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 5.5 Medium | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N | GitHub_M |
Weaknesses
- CWE-158 Improper Neutralization of Null Byte or NUL Character
Affected Products
| Product | Versions |
|---|---|
jqjqlang |
|
References
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