Reliance on undefined behavior in jq - #VU144352
Published: August 19, 2026
Vulnerability identifier: #VU144352
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-758
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper pointer arithmetic in jvp_utf8_backtrack in jv_unicode.c when parsing input. A local user can supply specially crafted input to cause a denial of service.
Affected software
jq
Remediation
Install security update from vendor's website.
jq - update to 1.8.2