CVE-2026-41256— jq: Embedded NUL truncates top-level jq programs loaded with -f
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I. Basic Information for CVE-2026-41256
Vulnerability Information
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Vulnerability Title
jq: Embedded NUL truncates top-level jq programs loaded with -f
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
空字节或NULL字符转义处理不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
jq 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
jq是jqlang开源的一个轻量级且灵活的命令行 JSON 处理器。 jq 1.8.1及之前版本存在安全漏洞，该漏洞源于通过-f加载的顶层jq程序在第一个嵌入NUL字节处被截断，可能导致编译和执行仅包含NUL之前的前缀部分，造成编译路径上的前缀/完整缓冲区不匹配。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-41256
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- https://github.com/jqlang/jq/security/advisories/GHSA-vf2h-chrj-q3fgx_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2026-41256
Same Patch Batch · jqlang · 2026-05-11 · 7 CVEs total
| CVE-2026-43896 | 6.2 MEDIUM | jq: Stack Overflow in Recursive Object Merge |
| CVE-2026-43894 | 6.2 MEDIUM | jq: Wild stack write via signed-integer overflow in decNumber D2U() macro |
| CVE-2026-43895 | 4.4 MEDIUM | jq: Embedded NUL in jq import paths causes local redaction-policy bypass and preserves sen |
| CVE-2026-41257 | jq: Signed-int overflow in `stack_reallocate` (jq VM stack) | |
| CVE-2026-40612 | jq: Stack overflow via unbounded recursion in jv_contains | |
| CVE-2026-44777 | jq: stack overflow in module loading on mutual `include` |
IV. Related Vulnerabilities
Same product: jq
- CVE-2026-43896
jq: Stack Overflow in Recursive Object Merge - CVE-2026-43895
jq: Embedded NUL in jq import paths causes local redaction-p - CVE-2026-44777
jq: stack overflow in module loading on mutual `include` - CVE-2026-43894
jq: Wild stack write via signed-integer overflow in decNumbe - CVE-2026-40612
jq: Stack overflow via unbounded recursion in jv_contains
Same vendor: jqlang
- CVE-2026-43896
jq: Stack Overflow in Recursive Object Merge - CVE-2026-43895
jq: Embedded NUL in jq import paths causes local redaction-p - CVE-2026-44777
jq: stack overflow in module loading on mutual `include` - CVE-2026-43894
jq: Wild stack write via signed-integer overflow in decNumbe - CVE-2026-40612
jq: Stack overflow via unbounded recursion in jv_contains
V. Comments for CVE-2026-41256
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