CVE-2026-41257
MEDIUM EPSS 3.9%
Published May 11, 20261mo ago · Modified Jun 17, 20262w ago
6.4 CVSS 4.0
Published May 11, 2026 1mo ago
Last Modified Jun 17, 2026 2w ago
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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:4.0/AV:L/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Attack Vector Local
Attack Complexity High
Privileges Required None
User Interaction P
Scope X
Threat Intelligence
EPSS Exploit Probability
3.9% percentile
Exploit & Patch Status
Public Exploit Known
No Patch Available
Weaknesses 2
CWE-190 Integer Overflow or Wraparound Numeric Error
CWE-787 Out-of-bounds Write Memory Safety
Affected Products 1
| Vendor | Product | Version | Range |
|---|---|---|---|
| jqlang | jq | * | ≤1.8.1 |
References 1
- github.com https://github.com/jqlang/jq/security/advisories/GHSA-4jm8-m363-4539
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.