Multiple vulnerabilities in Python (August 19, 2026)

unknownCVE-2026-17084 CVE-2026-15806

Multiple vulnerabilities have been discovered in Python. They allow an attacker to cause a breach of data confidentiality, a security policy bypass and a security issue not specified by the vendor.

CSIRTS triage

vendor: Python product: Python Information disclosure Authentication bypassOther

What: Multiple vulnerabilities in Python allow data confidentiality breaches, security policy bypass, and unspecified security issues.
Who is affected: All systems running affected Python versions are potentially impacted.
Urgency: Urgent patching required due to security policy bypass and confidentiality breach risks.
Action: Upgrade to the latest patched Python version and test compatibility with dependent applications.

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

⚡ Watch Python

Get an email when a new Python advisory drops — max one per day, one-click unsubscribe.

Details

Source: CERT-FR Avis de sécurité (FR · national-cert · site)
Severity: unknown
Published: 2026-08-19
Exploitation: Not in CISA KEV at last sync
Language: Machine-translated to English — verify against the original

Original advisory: https://www.cert.ssi.gouv.fr/avis/CERTFR-2026-AVI-1044/

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-2026-170840.51% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 41% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-158060.36% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 30% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-17084	coverage & exploitation status	NVD · CVE.org
CVE-2026-15806	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 Python

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.

medium[UPDATE] [medium] Red Hat Enterprise Linux (python-idna): Vulnerability allows denial of servicecert-bund · 2026-08-19
medium[NEW] [medium] Red Hat Enterprise Linux (python-idna): Vulnerability Enables Denial of Servicecert-bund · 2026-08-19
high[NEW] [high] Red Hat Enterprise Linux (python-pip): Vulnerability allows code executioncert-bund · 2026-08-19
mediumCVE-2026-73974: linuxfabrik-lib provides Python modules for database access, caching, shell execution, and API…nvd · 2026-08-18
highCVE-2026-55426: linuxfabrik-lib provides Python modules for database access, caching, shell execution, and API…nvd · 2026-08-18
unknownCVE-2026-53759: linuxfabrik-lib provides Python modules for database access, caching, shell execution, and API…nvd · 2026-08-18