CVE-2026-41256

Summary

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.

Affected Software

Weaknesses

• CWE-158: CWE-158: Improper Neutralization of Null Byte or NUL Character

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: no
  • Technical Impact: partial

Additional References

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

References

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

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