[UPDATE] [high] CPython: Multiple vulnerabilities
An attacker can exploit multiple vulnerabilities in CPython to manipulate files, bypass security measures, or disclose confidential information.
CSIRTS triage
- What
- An attacker can exploit multiple vulnerabilities in CPython to manipulate files, bypass security measures, or disclose confidential information.
- Who is affected
- Deployments of CPython are affected.
- Urgency
- Remediation is urgent due to the high severity of the vulnerabilities.
- Action
- Apply the latest security updates for CPython.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2044
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-08640.13% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 3% of all scored CVEs.
- Low exploitation riskCVE-2026-119400.63% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 47% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-0864 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-11940 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
Recent advisories for CPython
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- high[NEW] [high] CPython: Vulnerability allows Denial of Servicecert-bund · 2026-07-31
- medium[UPDATE] [medium] CPython: Multiple vulnerabilitiescert-bund · 2026-07-31
- medium[UPDATE] [medium] CPython: Multiple vulnerabilitiescert-bund · 2026-07-31
- low[UPDATE] [low] CPython: Vulnerability allows Denial of Servicecert-bund · 2026-07-31
- unknownVulnerability in CPython (July 30, 2026)cert-fr-avis · 2026-07-30
- medium[UPDATE] [medium] CPython: Vulnerability allows data manipulationcert-bund · 2026-07-28
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