CVE-2026-4870

Qiskit SDK is vulnerable to specific functions may recurse too deeply and overflow the available stack space, when encountering certain classical expressions.

High · published June 12, 2026

CVSS v3.1
7.5
EPSS
0%
Percentile
38.9
In the wild
Unconfirmed
What it is

IBM Qiskit SDK 0.43.0 through 2.5.0 could allow an attacker to trigger a segmentation fault leading to a denial of service due to uncontrolled recursion in the parser.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00460 · 38.9th percentile
Published
2026-06-12T20:52Z
EPSS history
Timeline
  • 12 JUN 20:52Z
    Qiskit SDK is vulnerable to specific functions may recurse too deeply and overflow the available stack space, when encountering certain classical expressions.
    cvelistv5