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TI-2026-16056 Aliases CVE-2026-19795

Qiskit SDK is vulnerable when deserializing QPY Files and may overflow the available stack space.

Priority LOW 27CWE-502Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-502.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00296 22nd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
IBMQiskit SDK2.1.0 – 2.5.1—No fix listedCNA
  • Qiskit SDK VendorIBM Affected 2.1.0 – 2.5.1 Fixed in — No fix listed CNA

CPE names CNA · 2

CPEVersionsRoleVendor
cpe:2.3:a:ibm:qiskit_sdk:2.1.0:*:*:*:*:*:*:*2.1.0—IBM
cpe:2.3:a:ibm:qiskit_sdk:2.5.1:*:*:*:*:*:*:*2.5.1—IBM
  • cpe:2.3:a:ibm:qiskit_sdk:2.1.0:*:*:*:*:*:*:* Versions 2.1.0 — ·IBM
  • cpe:2.3:a:ibm:qiskit_sdk:2.5.1:*:*:*:*:*:*:* Versions 2.5.1 — ·IBM

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-19795

References

Patch 1

  • TI-2026-08085 Unauthenticated Remote Code Execution via Auto-Login Bypass and Code Validation KEVCVSS 3.1CRITICAL 9.8
  • TI-2022-23774 IBM Aspera Faspex code execution KEVCVSS 3.1CRITICAL 9.8
  • TI-2020-03794 Improper authentication in IBM Data Risk Manager KEVCVSS 3.1CRITICAL 9.8
  • TI-2019-03441 Code injection in IBM Planning Analytics KEVCVSS 3.1CRITICAL 9.8
  • TI-2017-03639 Improper handling of exceptional conditions in Apache Struts KEVCVSS 3.1CRITICAL 9.8
  • TI-2015-06198 Serialized-object interfaces in certain IBM analytics, business solutions, cognitive, IT… KEVCVSS 3.1CRITICAL 9.8
See all 9711 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences