CERT-FR Warns of Python CPython Flaws
CERT-FR issued an advisory on multiple CPython vulnerabilities that can leak data or bypass security policies.
Sourcecert.ssi.gouv.fr — open the original
What to check
- Applies to
- The 2 CVEs named below. Whether you run an affected version is not assessed: check the versions the source lists.
- Exploitation
- No exploitation in the wild and no public exploit is recorded for the CVEs named.
CERT-FR published an advisory covering multiple vulnerabilities in CPython affecting systems that lack the latest security patches. The flaws, tracked as CVE-2026-15806 and CVE-2026-17084, can lead to a confidentiality breach, a security policy bypass, and an unspecified security impact as characterized by the vendor's own bulletins.
No active exploitation or specific threat actor activity is mentioned in the advisory. Organizations running affected CPython versions should consult the referenced Python Security Announce bulletins and apply the available patches to mitigate these risks.
Mentioned in this report
Source reporting: https://www.cert.ssi.gouv.fr/avis/CERTFR-2026-AVI-1044
Free public brief. Slack alerts on the vendors you run come with the paid plans, and a new account gets three days of them, no card.
What this brief leaves out
This page is the free tier: the write-up, the severity, the names. In the app the same report carries live profiles of the CVEs it names. The paid plans add the security research and news reporting the free tier leaves out.
It sits in a corpus of 16,433 reports from 149 sources, 661 of them written in the last seven days, and it grows through the day.
A new account starts with three days of all of it, no card, then keeps the government and CERT reporting free. Slack alerts are a paid-plan feature: name the vendors you run and Slack hears about the reports that touch them, not the rest of the week's. Nothing is charged unless you subscribe.
Create a free account What it costs