Vulnerability in CPython (July 2, 2026)
A vulnerability has been discovered in CPython. It allows an attacker to bypass the security policy.
CSIRTS triage
- What
- A vulnerability allows for security policy bypass.
- Who is affected
- Users of CPython are affected.
- Urgency
- Remediation is urgent due to the potential for exploitation.
- Action
- Apply patches or mitigations as provided by CPython.
AI-assisted analysis generated from the source advisory — verify against the original.
⚡ Watch CPython
Get an email when a new CPython advisory drops — max one per day, one-click unsubscribe.
Details
Original advisory: https://www.cert.ssi.gouv.fr/avis/CERTFR-2026-AVI-0828/
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-2026-43600.24% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 14% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-4360 | 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 · 2026-07-10
- low[UPDATE] [low] CPython: Vulnerability allows file manipulationcert-bund · 2026-07-10
- medium[UPDATE] [medium] CPython: Vulnerability allows bypassing security measurescert-bund · 2026-07-10
- medium[UPDATE] [medium] Cpython: Multiple vulnerabilitiescert-bund · 2026-07-10
- low[UPDATE] [low] CPython: Vulnerability allows unspecified attackcert-bund · 2026-07-10
- medium[UPDATE] [medium] cPython: Vulnerability allows Denial of Servicecert-bund · 2026-07-10
More from CERT-FR Avis de sécurité
- unknownMultiple vulnerabilities in Red Hat Linux kernel (July 10, 2026)2026-07-10
- unknownMultiple vulnerabilities in Ubuntu Linux kernel (July 10, 2026)2026-07-10
- unknownMultiple vulnerabilities in Progress MOVEit Transfer (July 10, 2026)2026-07-10
- unknownVulnerability in NetApp ONTAP 9 (July 10, 2026)2026-07-10
- unknownVulnerability in CPython (July 10, 2026)2026-07-10