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python3.9: Fix of 7 CVEs

Type: advisorySources: OSV

- CVE-2025-1795: fix incorrect parsing of email addresses with special chars - CVE-2025-4516: fix use-after-free in unicode-escape decoder with non-strict error handler - CVE-2025-6069: fix quadratic complexity in HTMLParser special input - CVE-2025-8291: fix zip64 end-of-central-directory record validation - CVE-2025-11468: fix incorrect parsing of empty email display names - CVE-2025-15282: fix control character injection in data: URL mediatype in urllib.request.DataHandler - CVE-2024-5642: fix buffer over-read in ssl.SSLContext.set_npn_protocols with empty list

Products
python-unversioned-command, python3, python3-debug, python3-devel, python3-idle, python3-libs, python3-test, python3-tkinter
Affected versions
Not specified
Fixed versions
3.9.21-2.el9_6.2.tuxcare.els7
CVEs
CVE-2024-5642, CVE-2025-11468, CVE-2025-15282, CVE-2025-1795, CVE-2025-4516, CVE-2025-6069, CVE-2025-8291
Confirmed fixed CVEs
Not specified
Updated in this feed
31 Oct 2026, 13:52 UTC · Revision 1

Source evidence

python3.9: Fix of 7 CVEs

core-osv · Original source

Published 8 May 2026, 09:41 UTC

- CVE-2025-1795: fix incorrect parsing of email addresses with special chars - CVE-2025-4516: fix use-after-free in unicode-escape decoder with non-strict error handler - CVE-2025-6069: fix quadratic complexity in HTMLParser special input - CVE-2025-8291: fix zip64 end-of-central-directory record validation - CVE-2025-11468: fix incorrect parsing of empty email display names - CVE-2025-15282: fix control character injection in data: URL mediatype in urllib.request.DataHandler - CVE-2024-5642: fix buffer over-read in ssl.SSLContext.set_npn_protocols with empty list

osv:CLSA-2026-1778233301

python-unversioned-command

Fixed versions: 3.9.21-2.el9_6.2.tuxcare.els7

python3

Fixed versions: 3.9.21-2.el9_6.2.tuxcare.els7

python3-debug

Fixed versions: 3.9.21-2.el9_6.2.tuxcare.els7

python3-devel

Fixed versions: 3.9.21-2.el9_6.2.tuxcare.els7

python3-idle

Fixed versions: 3.9.21-2.el9_6.2.tuxcare.els7

python3-libs

Fixed versions: 3.9.21-2.el9_6.2.tuxcare.els7

python3-test

Fixed versions: 3.9.21-2.el9_6.2.tuxcare.els7

python3-tkinter

Fixed versions: 3.9.21-2.el9_6.2.tuxcare.els7

Complete source record
{
  "id": "529c147b74b21e91da33efb16a60ecc6a6585af021de6e82e3bd736d14abe40c",
  "url": "https://osv.dev/vulnerability/CLSA-2026-1778233301",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "python3.9: Fix of 7 CVEs",
    "summary": "- CVE-2025-1795: fix incorrect parsing of email addresses with special chars - CVE-2025-4516: fix use-after-free in unicode-escape decoder with non-strict error handler - CVE-2025-6069: fix quadratic complexity in HTMLParser special input - CVE-2025-8291: fix zip64 end-of-central-directory record validation - CVE-2025-11468: fix incorrect parsing of empty email display names - CVE-2025-15282: fix control character injection in data: URL mediatype in urllib.request.DataHandler - CVE-2024-5642: fix buffer over-read in ssl.SSLContext.set_npn_protocols with empty list",
    "evidence": "osv:CLSA-2026-1778233301",
    "products": [
      {
        "name": {
          "value": "python-unversioned-command",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "3.9.21-2.el9_6.2.tuxcare.els7",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "python3",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "3.9.21-2.el9_6.2.tuxcare.els7",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "python3-debug",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "3.9.21-2.el9_6.2.tuxcare.els7",
            "evidence": "/affected/2/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "python3-devel",
          "evidence": "/affected/3/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "3.9.21-2.el9_6.2.tuxcare.els7",
            "evidence": "/affected/3/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "python3-idle",
          "evidence": "/affected/4/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "3.9.21-2.el9_6.2.tuxcare.els7",
            "evidence": "/affected/4/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "python3-libs",
          "evidence": "/affected/5/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "3.9.21-2.el9_6.2.tuxcare.els7",
            "evidence": "/affected/5/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "python3-test",
          "evidence": "/affected/6/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "3.9.21-2.el9_6.2.tuxcare.els7",
            "evidence": "/affected/6/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "python3-tkinter",
          "evidence": "/affected/7/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "3.9.21-2.el9_6.2.tuxcare.els7",
            "evidence": "/affected/7/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CLSA-2026-1778233301",
      "aliases": [
        "CLSA-2026-1778233301"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "3.9.21-2.el9_6.2.tuxcare.els7"
                }
              ]
            }
          ],
          "package": {
            "name": "python-unversioned-command",
            "purl": "pkg:rpm/tuxcare/python-unversioned-command?distro=almalinux-9.6",
            "ecosystem": "TuxCare:AlmaLinux:9.6"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.6esu/CLSA-2026-1778233301.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "3.9.21-2.el9_6.2.tuxcare.els7"
                }
              ]
            }
          ],
          "package": {
            "name": "python3",
            "purl": "pkg:rpm/tuxcare/python3?distro=almalinux-9.6",
            "ecosystem": "TuxCare:AlmaLinux:9.6"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.6esu/CLSA-2026-1778233301.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "3.9.21-2.el9_6.2.tuxcare.els7"
                }
              ]
            }
          ],
          "package": {
            "name": "python3-debug",
            "purl": "pkg:rpm/tuxcare/python3-debug?distro=almalinux-9.6",
            "ecosystem": "TuxCare:AlmaLinux:9.6"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.6esu/CLSA-2026-1778233301.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "3.9.21-2.el9_6.2.tuxcare.els7"
                }
              ]
            }
          ],
          "package": {
            "name": "python3-devel",
            "purl": "pkg:rpm/tuxcare/python3-devel?distro=almalinux-9.6",
            "ecosystem": "TuxCare:AlmaLinux:9.6"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.6esu/CLSA-2026-1778233301.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "3.9.21-2.el9_6.2.tuxcare.els7"
                }
              ]
            }
          ],
          "package": {
            "name": "python3-idle",
            "purl": "pkg:rpm/tuxcare/python3-idle?distro=almalinux-9.6",
            "ecosystem": "TuxCare:AlmaLinux:9.6"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.6esu/CLSA-2026-1778233301.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "3.9.21-2.el9_6.2.tuxcare.els7"
                }
              ]
            }
          ],
          "package": {
            "name": "python3-libs",
            "purl": "pkg:rpm/tuxcare/python3-libs?distro=almalinux-9.6",
            "ecosystem": "TuxCare:AlmaLinux:9.6"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.6esu/CLSA-2026-1778233301.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "3.9.21-2.el9_6.2.tuxcare.els7"
                }
              ]
            }
          ],
          "package": {
            "name": "python3-test",
            "purl": "pkg:rpm/tuxcare/python3-test?distro=almalinux-9.6",
            "ecosystem": "TuxCare:AlmaLinux:9.6"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.6esu/CLSA-2026-1778233301.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "3.9.21-2.el9_6.2.tuxcare.els7"
                }
              ]
            }
          ],
          "package": {
            "name": "python3-tkinter",
            "purl": "pkg:rpm/tuxcare/python3-tkinter?distro=almalinux-9.6",
            "ecosystem": "TuxCare:AlmaLinux:9.6"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.6esu/CLSA-2026-1778233301.json"
          }
        }
      ],
      "modified": "2026-10-21T10:46:56.919810685Z",
      "provider": "osv",
      "upstream": [
        "CVE-2024-5642",
        "CVE-2025-11468",
        "CVE-2025-15282",
        "CVE-2025-1795",
        "CVE-2025-4516",
        "CVE-2025-6069",
        "CVE-2025-8291"
      ],
      "references": [
        "https://errata.tuxcare.com/els_os/tuxcare9.6esu/CLSA-2026-1778233301.html"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2024-5642",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2025-11468",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2025-15282",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2025-1795",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2025-4516",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2025-6069",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2025-8291",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 392285,
  "published_at": "2026-05-08T09:41:47+00:00"
}