MEDIUM SeverityCVSS 4.06.4CVSS:4.0/AV:L/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P

CVE-2026-41257

Last updated May 11, 2026 · Published May 11, 2026

Description

jq is a command-line JSON processor. In 1.8.1 and earlier, the jq bytecode VM's data stack tracks its allocation size in a signed int. When the stack grows beyond ≈1 GiB (via deeply nested generator forks), the doubling arithmetic overflows. The wrapped value is passed to realloc and then used for a memmove with attacker-influenced offsets.

Affected products

1 listed

jqlang:jq

Mappings

CWE

CWE-190CWE-787

CAPEC

None listed.