CPython Vulnerability - 20261005002¶
Overview¶
The WASOC has been made aware a critical vulnerabilty affecting CPython, which is used in multiple Operating Systems and perimeter devices.
The vulnerability could allow for remote, unauthenticated TLS client can make a server crash or call through a freed pointer if its sni_callback assigns a different context to SSLSocket.context.
What is vulnerable?¶
| Product(s) Affected | Version(s) | CVE | CVSS | Severity |
|---|---|---|---|---|
| CPython | - 0 < 3.10.22 (python) - 3.11.0 < 3.11.17 (python) - 3.12.0 < 3.12.15 (python) - 3.13.0 < 3.13.16 (python) - 3.14.0 < 3.14.8 (python) - 3.15.0a1 < 3.15.0rc3 (python) |
CVE-2026-19445 | 9.2 | Critical |
What has been observed?¶
The WASOC has not received any reports of exploitation of this vulnerability on Western Australian Government networks at the time of writing.
Recommendation¶
The WASOC recommends administrators apply the solutions as per vendor instructions to all affected devices within expected timeframes (refer Patch Management):
- GitHub Advisory DB: https://github.com/advisories/GHSA-7jvw-f348-84gq
Additional References¶
- Vulnerability Disclosure: https://github.com/abraxas/cve-2026-19445-sni-uaf