CVE-2026-19445

Katalog CVE

CVSS 9.2 · Critical EPSS 0,43%

Kerentanan Use After Free. Skor CVSS 4.0 9.2 (Critical) menurut python.org.

Deskripsi (NVD)

A 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 (the documented way to select a certificate per server name) and nothing else keeps the original ssl.SSLContext alive. Typical cases are servers that create an SSLContext per connection or replace it while connections are open; servers that wrap their listening socket with it are not affected. Mitigation: keep a reference to every SSLContext that sets sni_callback for the lifetime of the server. TLS clients are not affected.

Rincian

Terbit di NVD

30 September 2026

Terakhir diubah

3 Oktober 2026

Status NVD

Awaiting Analysis

CVSS 4.0

9.2 (Critical), sumber python.org
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-416: Use After Free

EPSS (30 hari)

0,43% peluang dieksploitasi; lebih tinggi dari 35,4% CVE lain

Produk dan versi terdampak

NVD belum mencantumkan data produk (CPE) untuk CVE ini. Produk yang terdampak biasanya disebut di deskripsi dan di advisory vendor pada daftar referensi.

Referensi dan perbaikan

• https://github.com/python/cpython/commit/34a53dce8174da2fceb12fe084a4def02a10053d
• https://github.com/python/cpython/commit/46133cd57d309652139ada74014aca7665ac552b
• https://github.com/python/cpython/commit/63fab143d94cafae71850831acfb52041ba44af7
• https://github.com/python/cpython/commit/b12968cefe69ca1dcb8606c832ff73ee7dbf4ba8
• https://github.com/python/cpython/commit/cd7e51e7d4563866fbaa1e2521ae69b45daf3698
• https://github.com/python/cpython/commit/d8717ed01717a9641686e6e6f83f0ab8af235e2c
• https://github.com/python/cpython/commit/ec44b5a3258cbda947d5e07242ee562ed05ef24b
• https://github.com/python/cpython/issues/156293
• https://github.com/python/cpython/pull/158504
• https://mail.python.org/archives/list/security-announce@python.org/thread/QMQIUQB6WGGC3MI7I3WKQXOYOBDSPPS3/
• http://www.openwall.com/lists/oss-security/2026/09/30/17