Important: python3 security update

{
  "id": "91ae0006f495071767a59ee674bfbf3e6825c78d1cbc0c2f9150b7f3e87deb4d",
  "url": "https://osv.dev/vulnerability/RLSA-2026%3A85239",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Important: python3 security update",
    "summary": "Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems. Security Fix(es): * python: python: Arbitrary file deletion via race condition during temporary directory cleanup (CVE-2026-12345) * python: python: Certificate verification bypass via missing server_hostname validation in SSLContext.wrap_bio() (CVE-2026-19553) * python: Use-after-free of a server-side SSLContext when sni_callback switches contexts (CVE-2026-19445) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.",
    "evidence": "osv:RLSA-2026:85239",
    "products": [
      {
        "name": {
          "value": "python3",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "0:3.6.8-79.el8_10.rocky.0",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "RLSA-2026:85239",
      "aliases": [
        "RLSA-2026:85239"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "0:3.6.8-79.el8_10.rocky.0"
                }
              ],
              "database_specific": {
                "yum_repository": "BaseOS"
              }
            }
          ],
          "package": {
            "name": "python3",
            "purl": "pkg:rpm/rocky-linux/python3?distro=rocky-linux-8&epoch=0",
            "ecosystem": "Rocky Linux:8"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/resf-osv-data/RLSA-2026:85239.json"
          }
        }
      ],
      "modified": "2026-10-21T07:15:10.777884989Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-12345",
        "CVE-2026-19445",
        "CVE-2026-19553"
      ],
      "references": [
        "https://errata.rockylinux.org/RLSA-2026:85239",
        "https://bugzilla.redhat.com/show_bug.cgi?id=2543492",
        "https://bugzilla.redhat.com/show_bug.cgi?id=2544127",
        "https://bugzilla.redhat.com/show_bug.cgi?id=2544138",
        "https://access.redhat.com/errata/RHSA-2026:85239"
      ],
      "provider_metadata": {
        "license": "CC-BY-4.0",
        "license_url": "https://creativecommons.org/licenses/by/4.0/",
        "source_advisory": "RHSA-2026:85239"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-12345",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-19445",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-19553",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 391650,
  "published_at": "2026-10-21T06:37:12.817086+00:00"
}