Is CVE-2026-40469 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-40469?

CVE-2026-40469 has a CVSS v3 severity of CRITICAL (9.1).

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CVE-2026-40469

Description

Integer overflow vulnerability has been found in "builtin.c" program file of gawk (do_sub() routine). This issue could be used to overwrite gawk heap metadata and objects causing the program to crash. It affects 32-bit builds of gawk in versions 5.4.0 and below.