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6.4 Medium

CVE-2026-41257 jq is a command-line JSON processor

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 and versions

Product Affected versions Fixed in
jq 1.8 earliest → 1.8.1 No fix stated

References

Timeline

  1. Published
  2. Last modified

Other CVEs of jq

The 23 CVEs of jq →
CVE-2026-47770 jq is a command-line JSON processor 6.8 Medium CVE-2026-49839 jq is a command-line JSON processor 7.1 High CVE-2026-54679 jq is a command-line JSON processor 6.9 Medium CVE-2026-43896 jq is a command-line JSON processor 6.2 Medium
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