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    CVE-2026-41256

    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.

    Published:May 11, 2026
    Last Modified:May 13, 2026
    EPS:May 11, 2026
    EPSS Score:0.00012
    CVSS Score:5.5

    Affected Products

    Vendor
    Jqlang
    Product
    Jq

    Exploits

    https://github.com/jqlang/jq/security/advisories/GHSA-vf2h-chrj-q3fghttps://github.com/jqlang/jq/security/advisories/GHSA-vf2h-chrj-q3fg

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-52 Embedding NULL Bytes
    CAPEC-53 Postfix, Null Terminate, and Backslash

    Related CVEs

    CVE-2026-47770 (CVSS 6.8) — jq is a command-line JSON processor. Prior to 1.8.2, comparing two sufficiently deeply nested arrays with the …
    CVE-2026-49839 (CVSS 7.1) — jq is a command-line JSON processor. Prior to 1.8.2,` jq --rawfile` can turn a handled oversized-string error …
    CVE-2026-54679 (CVSS 6.9) — jq is a command-line JSON processor. Prior to 1.8.2, on 32bit system, jvp_string_append has a chance of intege…
    CVE-2026-43896 (CVSS 6.2) — jq is a command-line JSON processor. In 1.8.1 and earlier, unbounded recursion in jv_object_merge_recursive() …
    CVE-2026-43895 (CVSS 4.4) — jq is a command-line JSON processor. In 1.8.1 and earlier, jq accepts embedded NUL bytes in import paths at th…
    CVE-2026-44777 (CVSS 5.4) — jq is a command-line JSON processor. In 1.8.2rc1 and earlier, the ordinary module loader recurses without cycl…
    CVE-2026-43894 (CVSS 6.2) — jq is a command-line JSON processor. In 1.8.1 and earlier, when decNumberFromString is given a number literal …
    CVE-2026-40612 (CVSS 5.4) — jq is a command-line JSON processor. In 1.8.1 and earlier, jv_contains recurses into nested arrays/objects wit…
    CVE-2026-41257 (CVSS 6.4) — jq is a command-line JSON processor. In 1.8.1 and earlier, the jq bytecode VM's data stack tracks its allocati…
    CVE-2026-33948 (CVSS 2.9) — jq is a command-line JSON processor. Commits before 6374ae0bcdfe33a18eb0ae6db28493b1f34a0a5b contain a vulnera…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High