CVE-2026-43894

Name
CVE-2026-43894
Description
jq is a command-line JSON processor. In 1.8.1 and earlier, when decNumberFromString is given a number literal of INT_MAX-1 (2147483646) digits, the D2U() macro overflows during signed-int arithmetic. The wrapped negative value bypasses the heap-allocation size check, causes the function to use a 30-byte stack buffer, and then writes ≈715 million 16-bit units (≈1.4 GiB) at an offset 1.43 GiB below the stack frame. The written content is fully attacker-controlled (the parsed decimal digits, packed 3-per-unit).
NVD Severity
unknown
Other trackers
CVE, NVD, CERT, CVE Details, CIRCL, Arch Linux, Debian, Red Hat, Ubuntu, Gentoo, SUSE (Bugzilla), SUSE (CVE), Mageia
Mailing lists
oss-security, full-disclosure, bugtraq
Exploits
Exploit DB, Metasploit
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
security-advisories@github.com https://github.com/jqlang/jq/security/advisories/GHSA-5v7p-2r57-2g4g

Match rules

CPE URI Source package Min version Max version
cpe:2.3:a:jqlang:jq:*:*:*:*:*:*:*:* jq >= None <= 1.8.1

Vulnerable and fixed packages

Source package Branch Version Maintainer Status
jq edge-main 1.8.1-r0 Patrycja Rosa <alpine@ptrcnull.me> possibly vulnerable
jq edge-main 1.8.0-r0 Patrycja Rosa <alpine@ptrcnull.me> possibly vulnerable
jq edge-main 1.7.1-r0 Patrycja Rosa <alpine@ptrcnull.me> possibly vulnerable
jq edge-main 1.6_rc1-r0 None possibly vulnerable
jq 3.23-main 1.8.1-r0 Patrycja Rosa <alpine@ptrcnull.me> possibly vulnerable
jq 3.22-main 1.8.1-r0 Patrycja Rosa <alpine@ptrcnull.me> possibly vulnerable
jq 3.22-main 1.8.0-r0 Patrycja Rosa <alpine@ptrcnull.me> possibly vulnerable
jq 3.22-main 1.7.1-r0 None possibly vulnerable
jq 3.22-main 1.6_rc1-r0 None possibly vulnerable
jq 3.21-main 1.7.1-r0 Patrycja Rosa <alpine@ptrcnull.me> possibly vulnerable
jq 3.21-main 1.6_rc1-r0 None possibly vulnerable
jq 3.20-main 1.7.1-r0 Patrycja Rosa <alpine@ptrcnull.me> possibly vulnerable
jq 3.20-main 1.6_rc1-r0 None possibly vulnerable
jq 3.19-main 1.7.1-r0 Patrycja Rosa <alpine@ptrcnull.me> possibly vulnerable
jq 3.19-main 1.6_rc1-r0 None possibly vulnerable