CVE-2026-12003
An attacker can exploit multiple vulnerabilities in CPython to manipulate files and trigger a Denial-of-Service condition.
CSIRTS triage
- What
- Multiple vulnerabilities allow an attacker to manipulate files and trigger a Denial-of-Service condition.
- Who is affected
- Deployments of CPython are affected.
- Urgency
- Remediation is medium urgency as the vulnerabilities can lead to service disruption.
- Action
- Update to the latest version of CPython.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.14% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 3% of all EPSS-scored CVEs.
Advisory coverage (3)
- medium[UPDATE] [medium] CPython: Multiple vulnerabilitiescert-bund · 2026-07-07
- unknownVulnerability in CPython for Windows (June 22, 2026)cert-fr-avis · 2026-06-22
- unknownCVE-2026-12003: CPython >3.11 Insecure Input Validation resulting in privilege escalationmsrc · 2026-06-09
External references
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