[UPDATE] [medium] CPython: Multiple vulnerabilities

mediumCVE-2026-1502 CVE-2026-3446

An attacker can exploit multiple vulnerabilities in CPython to bypass security measures and manipulate data.

CSIRTS triage

vendor: CPython product: CPython Authentication bypassOther

What: Multiple vulnerabilities in CPython allow attackers to bypass security measures and manipulate data.
Who is affected: Local attackers using affected versions of CPython are at risk.
Urgency: Remediation is medium urgency due to the potential for data manipulation and security bypass.
Action: Update to the latest version of CPython.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: CERT-Bund (BSI) Security Advisories (DE · national-cert · site)
Severity: medium
Published: 2026-07-10
Exploitation: Not in CISA KEV at last sync
Language: Machine-translated to English — verify against the original

Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-1064

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-2026-15020.56% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 43% of all scored CVEs.
Low exploitation riskCVE-2026-34460.19% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 9% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-1502	coverage & exploitation status	NVD · CVE.org
CVE-2026-3446	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

unknownUSN-8509-1: Python vulnerabilitiesubuntu

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