CVE-2026-19795: CWE-502 Deserialization of Untrusted Data in IBM Qiskit SDK
Description
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.
CVSS v3.1
Score 6.2medium
Affected software
IBM
Qiskit SDK
cpe:2.3:a:ibm:qiskit_sdk:2.1.0:*:*:*:*:*:*:*cpe:2.3:a:ibm:qiskit_sdk:2.5.1:*:*:*:*:*:*:*Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability identified as CVE-2026-19795 affects IBM Qiskit SDK version 2.1.0. It involves improper handling of untrusted data during the deserialization of QPY payloads, leading to a stack overflow condition. A maliciously crafted QPY payload can cause a segmentation fault, crashing the application and causing denial of service. The vulnerability is classified under CWE-502 (Deserialization of Untrusted Data). There is no vendor-provided remediation or patch information available at this time, and no known exploits have been reported in the wild.
Potential Impact
Successful exploitation results in denial of service due to application crash from a segmentation fault triggered by stack overflow during deserialization. There is no indication of confidentiality or integrity impact. The attack requires local access and no privileges are needed.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, avoid deserializing untrusted QPY payloads to prevent triggering the vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- ibm
- Date Reserved
- 2026-08-13T19:40:18.000Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a99d38facd9273b496689a7
Added to database: 09/03/2026, 20:07:43 UTC
Last enriched: 09/07/2026, 11:51:09 UTC
Last updated: 10/17/2026, 06:48:16 UTC
Views: 110
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