CVE-2026-19795CWE-502insecure-deserialization

CVE-2026-19795

Medium · published September 4, 2026

CVSS v3.1
6.2
EPSS
0%
Percentile
1.3
In the wild
Unconfirmed
What it is

Qiskit could allow a local attacker to cause a denial of service due to a stack overflow during deserialization of QPY payloads. A malicious QPY payload can trigger a segmentation fault, causing the application to crash when deserializing untrusted input.

The record
Technical detail
CVSS v3.1
6.2 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00112 · 1.3th percentile
Weakness
CWE-502 · Deserialization of Untrusted Data
Published
2026-09-04T00:17Z
References (1)
https://www.ibm.com/support/pages/node/7285932 · [email protected]
EPSS history
Timeline
  • 05 SEP 03:40Z
    EPSS moved — → 0%
    epss
  • 03 SEP 19:56Z
    Qiskit SDK is vulnerable when deserializing QPY Files and may overflow the available stack space.
    cvelistv5