Vulnerability-Lookup

CVE-2025-4516 (GCVE-0-2025-4516)

Vulnerability from cvelistv5 – Published: 2025-05-15 13:29 – Updated: 2026-07-31 14:02

Title

Use-after-free in "unicode_escape" decoder with error handler

Summary

There is an issue in CPython when using `bytes.decode("unicode_escape", error="ignore|replace")`. If you are not using the "unicode_escape" encoding or an error handler your usage is not affected. To work-around this issue you may stop using the error= handler and instead wrap the bytes.decode() call in a try-except catching the DecodeError.

Severity

5.9 (Medium)


                        
                          CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-05-15 14:18 UTC

CWE

CWE-416 - Use After Free

Assigner

PSF mitre root

References

12 references

URL	Tags
https://github.com/python/cpython/issues/133767	issue-tracking
https://github.com/python/cpython/pull/129648	patch
https://mail.python.org/archives/list/security-an…	vendor-advisory
https://github.com/python/cpython/commit/69b4387f…	patch
https://github.com/python/cpython/commit/9f69a586…	patch
https://github.com/python/cpython/commit/4398b788…	patch
https://github.com/python/cpython/commit/6279eb8c…	patch
https://github.com/python/cpython/commit/73b3040f…	patch
https://github.com/python/cpython/commit/8d35fd1b…	patch
https://github.com/python/cpython/commit/ab9893c4…	patch
http://www.openwall.com/lists/oss-security/2025/05/16/4
http://www.openwall.com/lists/oss-security/2025/05/19/1

Impacted products

1 product

Vendor	Product	Version	CPE status
Python Software Foundation	CPython	Affected: 0 , < 3.9.23 (python) Affected: 3.10.0 , < 3.10.18 (python) Affected: 3.11.0 , < 3.11.13 (python) Affected: 3.12.0 , < 3.12.11 (python) Affected: 3.13.0 , < 3.13.4 (python) Affected: 3.14.0a1 , < 3.14.0b2 (python)	guessed

Show details on NVD website

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              "scenarios": [
                {
                  "lang": "en",
                  "value": "GENERAL"
                }
              ]
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-416",
                  "description": "CWE-416 Use After Free",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-07-31T14:02:21.178Z",
            "orgId": "28c92f92-d60d-412d-b760-e73465c3df22",
            "shortName": "PSF"
          },
          "references": [
            {
              "tags": [
                "issue-tracking"
              ],
              "url": "https://github.com/python/cpython/issues/133767"
            },
            {
              "tags": [
                "patch"
              ],
              "url": "https://github.com/python/cpython/pull/129648"
            },
            {
              "tags": [
                "vendor-advisory"
              ],
              "url": "https://mail.python.org/archives/list/security-announce@python.org/thread/L75IPBBTSCYEF56I2M4KIW353BB3AY74/"
            },
            {
              "tags": [
                "patch"
              ],
              "url": "https://github.com/python/cpython/commit/69b4387f78f413e8c47572a85b3478c47eba8142"
            },
            {
              "tags": [
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              "url": "https://github.com/python/cpython/commit/9f69a58623bd01349a18ba0c7a9cb1dad6a51e8e"
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              "url": "https://github.com/python/cpython/commit/4398b788ffc1f954a2c552da285477d42a571292"
            },
            {
              "tags": [
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              ],
              "url": "https://github.com/python/cpython/commit/6279eb8c076d89d3739a6edb393e43c7929b429d"
            },
            {
              "tags": [
                "patch"
              ],
              "url": "https://github.com/python/cpython/commit/73b3040f592436385007918887b7e2132aa8431f"
            },
            {
              "tags": [
                "patch"
              ],
              "url": "https://github.com/python/cpython/commit/8d35fd1b34935221aff23a1ab69a429dd156be77"
            },
            {
              "tags": [
                "patch"
              ],
              "url": "https://github.com/python/cpython/commit/ab9893c40609935e0d40a6d2a7307ea51aec598b"
            }
          ],
          "source": {
            "discovery": "UNKNOWN"
          },
          "title": "Use-after-free in \"unicode_escape\" decoder with error handler",
          "x_generator": {
            "engine": "Vulnogram 0.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "28c92f92-d60d-412d-b760-e73465c3df22",
        "assignerShortName": "PSF",
        "cveId": "CVE-2025-4516",
        "datePublished": "2025-05-15T13:29:20.126Z",
        "dateReserved": "2025-05-09T14:59:53.878Z",
        "dateUpdated": "2026-07-31T14:02:21.178Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
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}

ICSA-26-043-06

Vulnerability from csaf_cisa - Published: 2026-01-28 00:00 - Updated: 2026-02-25 07:00

Summary

Siemens SINEC OS

Scope

51 vulnerabilities in this advisory, including CVE-2025-4516.

CVE-2025-4516

5.1 (Medium)


                
                  CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Known affected: 16 products

https://support.industry.siemens.com/cs/ww/en/view/109997626/

Open the full advisory

MSRC_CVE-2025-4516

Vulnerability from csaf_microsoft - Published: 2025-05-02 00:00 - Updated: 2026-02-21 02:51

Summary

Use-after-free in "unicode_escape" decoder with error handler

Scope

1 vulnerability in this advisory, including CVE-2025-4516.

CVE-2025-4516

Fixed: 3 products Known affected: 3 products Known not affected: 1 product

https://learn.microsoft.com/en-us/azure/azure-linux/tutoria…

Open the full advisory

OESA-2025-2288 (CVE-2025-4516)

Vulnerability from osv_openeuler – Published: 2025-09-12 11:09 – Updated: 2026-08-06 11:09 – Source website

Summary

python3 security update

Details

Python combines remarkable power with very clear syntax. It has modules, classes, exceptions, very high level dynamic data types, and dynamic typing. There are interfaces to many system calls and libraries, as well as to various windowing systems. New built-in modules are easily written in C or C++ (or other languages, depending on the chosen implementation). Python is also usable as an extension language for applications written in other languages that need easy-to-use scripting or automation interfaces.

Security Fix(es):

There is an issue in CPython when using bytes.decode("unicode_escape", error="ignore|replace"). If you are not using the "unicode_escape" encoding or an error handler your usage is not affected. To work-around this issue you may stop using the error= handler and instead wrap the bytes.decode() call in a try-except catching the DecodeError.(CVE-2025-4516)

Severity

5.1 (Medium)


                    
                      CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

References

URL

Type

	https://www.openeuler.org/zh/security/security-bu…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2025-4516	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "python3-3.9.9-40.oe2203sp3.aarch64.rpm",
          "python3-debug-3.9.9-40.oe2203sp3.aarch64.rpm",
          "python3-debuginfo-3.9.9-40.oe2203sp3.aarch64.rpm",
          "python3-debugsource-3.9.9-40.oe2203sp3.aarch64.rpm",
          "python3-devel-3.9.9-40.oe2203sp3.aarch64.rpm",
          "python3-unversioned-command-3.9.9-40.oe2203sp3.aarch64.rpm"
        ],
        "noarch": [
          "python3-help-3.9.9-40.oe2203sp3.noarch.rpm"
        ],
        "src": [
          "python3-3.9.9-40.oe2203sp3.src.rpm"
        ],
        "x86_64": [
          "python3-3.9.9-40.oe2203sp3.x86_64.rpm",
          "python3-debug-3.9.9-40.oe2203sp3.x86_64.rpm",
          "python3-debuginfo-3.9.9-40.oe2203sp3.x86_64.rpm",
          "python3-debugsource-3.9.9-40.oe2203sp3.x86_64.rpm",
          "python3-devel-3.9.9-40.oe2203sp3.x86_64.rpm",
          "python3-unversioned-command-3.9.9-40.oe2203sp3.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:22.03-LTS-SP3",
        "name": "python3",
        "purl": "pkg:rpm/openEuler/python3\u0026distro=openEuler-22.03-LTS-SP3"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.9.9-40.oe2203sp3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "Medium"
  },
  "details": "Python combines remarkable power with very clear syntax. It has modules, classes, exceptions, very high level dynamic data types, and dynamic typing. There are interfaces to many system calls and libraries, as well as to various windowing systems. New built-in modules are easily written in C or C++ (or other languages, depending on the chosen implementation). Python is also usable as an extension language for applications written in other languages that need easy-to-use scripting or automation interfaces.\r\n\r\nSecurity Fix(es):\n\nThere is an issue in CPython when using `bytes.decode(\u0026quot;unicode_escape\u0026quot;, error=\u0026quot;ignore|replace\u0026quot;)`. If you are not using the \u0026quot;unicode_escape\u0026quot; encoding or an error handler your usage is not affected. To work-around this issue you may stop using the error= handler and instead wrap the bytes.decode() call in a try-except catching the DecodeError.(CVE-2025-4516)",
  "id": "OESA-2025-2288",
  "modified": "2026-08-06T11:09:21Z",
  "published": "2025-09-12T11:09:21Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2025-2288"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-4516"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "python3 security update",
  "upstream": [
    "CVE-2025-4516"
  ]
}

OESA-2025-2289 (CVE-2025-4516)

Vulnerability from osv_openeuler – Published: 2025-09-12 11:09 – Updated: 2026-08-06 11:09 – Source website

Summary

python3 security update

Details

Security Fix(es):

Severity

5.1 (Medium)


                    
                      CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

References

URL

Type

	https://www.openeuler.org/zh/security/security-bu…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2025-4516	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "python3-3.9.9-44.oe2203sp4.aarch64.rpm",
          "python3-debug-3.9.9-44.oe2203sp4.aarch64.rpm",
          "python3-debuginfo-3.9.9-44.oe2203sp4.aarch64.rpm",
          "python3-debugsource-3.9.9-44.oe2203sp4.aarch64.rpm",
          "python3-devel-3.9.9-44.oe2203sp4.aarch64.rpm",
          "python3-unversioned-command-3.9.9-44.oe2203sp4.aarch64.rpm"
        ],
        "noarch": [
          "python3-help-3.9.9-44.oe2203sp4.noarch.rpm"
        ],
        "src": [
          "python3-3.9.9-44.oe2203sp4.src.rpm"
        ],
        "x86_64": [
          "python3-3.9.9-44.oe2203sp4.x86_64.rpm",
          "python3-debug-3.9.9-44.oe2203sp4.x86_64.rpm",
          "python3-debuginfo-3.9.9-44.oe2203sp4.x86_64.rpm",
          "python3-debugsource-3.9.9-44.oe2203sp4.x86_64.rpm",
          "python3-devel-3.9.9-44.oe2203sp4.x86_64.rpm",
          "python3-unversioned-command-3.9.9-44.oe2203sp4.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:22.03-LTS-SP4",
        "name": "python3",
        "purl": "pkg:rpm/openEuler/python3\u0026distro=openEuler-22.03-LTS-SP4"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.9.9-44.oe2203sp4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "Medium"
  },
  "details": "Python combines remarkable power with very clear syntax. It has modules, classes, exceptions, very high level dynamic data types, and dynamic typing. There are interfaces to many system calls and libraries, as well as to various windowing systems. New built-in modules are easily written in C or C++ (or other languages, depending on the chosen implementation). Python is also usable as an extension language for applications written in other languages that need easy-to-use scripting or automation interfaces.\r\n\r\nSecurity Fix(es):\n\nThere is an issue in CPython when using `bytes.decode(\u0026quot;unicode_escape\u0026quot;, error=\u0026quot;ignore|replace\u0026quot;)`. If you are not using the \u0026quot;unicode_escape\u0026quot; encoding or an error handler your usage is not affected. To work-around this issue you may stop using the error= handler and instead wrap the bytes.decode() call in a try-except catching the DecodeError.(CVE-2025-4516)",
  "id": "OESA-2025-2289",
  "modified": "2026-08-06T11:09:21Z",
  "published": "2025-09-12T11:09:21Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2025-2289"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-4516"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "python3 security update",
  "upstream": [
    "CVE-2025-4516"
  ]
}

OESA-2025-2290 (CVE-2025-1795)

Vulnerability from osv_openeuler – Published: 2025-09-12 11:09 – Updated: 2026-08-06 11:09 – Source website

Summary

python3 security update

Details

Security Fix(es):

During an address list folding when a separating comma ends up on a folded line and that line is to be unicode-encoded then the separator itself is also unicode-encoded. Expected behavior is that the separating comma remains a plan comma. This can result in the address header being misinterpreted by some mail servers.(CVE-2025-1795)

There is a defect in the CPython 'tarfile' module affecting the 'TarFile' extraction and entry enumeration APIs. The tar implementation would process tar archives with negative offsets without error, resulting in an infinite loop and deadlock during the parsing of maliciously crafted tar archives.(CVE-2025-8194)

Severity

7.5 (High)


                    
                      CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

URL

Type

	https://www.openeuler.org/zh/security/security-bu…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2025-1795	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2025-4516	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2025-8194	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "python3-3.11.6-14.oe2403.aarch64.rpm",
          "python3-debug-3.11.6-14.oe2403.aarch64.rpm",
          "python3-debuginfo-3.11.6-14.oe2403.aarch64.rpm",
          "python3-debugsource-3.11.6-14.oe2403.aarch64.rpm",
          "python3-devel-3.11.6-14.oe2403.aarch64.rpm",
          "python3-tkinter-3.11.6-14.oe2403.aarch64.rpm",
          "python3-unversioned-command-3.11.6-14.oe2403.aarch64.rpm"
        ],
        "noarch": [
          "python3-help-3.11.6-14.oe2403.noarch.rpm"
        ],
        "src": [
          "python3-3.11.6-14.oe2403.src.rpm"
        ],
        "x86_64": [
          "python3-3.11.6-14.oe2403.x86_64.rpm",
          "python3-debug-3.11.6-14.oe2403.x86_64.rpm",
          "python3-debuginfo-3.11.6-14.oe2403.x86_64.rpm",
          "python3-debugsource-3.11.6-14.oe2403.x86_64.rpm",
          "python3-devel-3.11.6-14.oe2403.x86_64.rpm",
          "python3-tkinter-3.11.6-14.oe2403.x86_64.rpm",
          "python3-unversioned-command-3.11.6-14.oe2403.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS",
        "name": "python3",
        "purl": "pkg:rpm/openEuler/python3\u0026distro=openEuler-24.03-LTS"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.11.6-14.oe2403"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "High"
  },
  "details": "Python combines remarkable power with very clear syntax. It has modules, classes, exceptions, very high level dynamic data types, and dynamic typing. There are interfaces to many system calls and libraries, as well as to various windowing systems. New built-in modules are easily written in C or C++ (or other languages, depending on the chosen implementation). Python is also usable as an extension language for applications written in other languages that need easy-to-use scripting or automation interfaces.\r\n\r\nSecurity Fix(es):\n\nDuring an address list folding when a separating comma ends up on a folded line and that line is to be unicode-encoded then the separator itself is also unicode-encoded. Expected behavior is that the separating comma remains a plan comma. This can result in the address header being misinterpreted by some mail servers.(CVE-2025-1795)\n\nThere is an issue in CPython when using `bytes.decode(\u0026quot;unicode_escape\u0026quot;, error=\u0026quot;ignore|replace\u0026quot;)`. If you are not using the \u0026quot;unicode_escape\u0026quot; encoding or an error handler your usage is not affected. To work-around this issue you may stop using the error= handler and instead wrap the bytes.decode() call in a try-except catching the DecodeError.(CVE-2025-4516)\n\nThere is a defect in the CPython \u0026apos;tarfile\u0026apos; module affecting the \u0026apos;TarFile\u0026apos; extraction and entry enumeration APIs. The tar implementation would process tar archives with negative offsets without error, resulting in an infinite loop and deadlock during the parsing of maliciously crafted tar archives.(CVE-2025-8194)",
  "id": "OESA-2025-2290",
  "modified": "2026-08-06T11:09:21Z",
  "published": "2025-09-12T11:09:21Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2025-2290"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-1795"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-4516"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-8194"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "python3 security update",
  "upstream": [
    "CVE-2025-1795",
    "CVE-2025-4516",
    "CVE-2025-8194"
  ]
}

OESA-2025-2302 (CVE-2025-1795)

Vulnerability from osv_openeuler – Published: 2025-09-19 11:09 – Updated: 2026-08-06 11:09 – Source website

Summary

python3 security update

Details

Security Fix(es):

Severity

5.1 (Medium)


                    
                      CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

References

URL

Type

	https://www.openeuler.org/zh/security/security-bu…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2025-1795	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2025-4516	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "python3-3.11.6-16.oe2403sp2.aarch64.rpm",
          "python3-debug-3.11.6-16.oe2403sp2.aarch64.rpm",
          "python3-debuginfo-3.11.6-16.oe2403sp2.aarch64.rpm",
          "python3-debugsource-3.11.6-16.oe2403sp2.aarch64.rpm",
          "python3-devel-3.11.6-16.oe2403sp2.aarch64.rpm",
          "python3-tkinter-3.11.6-16.oe2403sp2.aarch64.rpm",
          "python3-unversioned-command-3.11.6-16.oe2403sp2.aarch64.rpm"
        ],
        "noarch": [
          "python3-help-3.11.6-16.oe2403sp2.noarch.rpm"
        ],
        "src": [
          "python3-3.11.6-16.oe2403sp2.src.rpm"
        ],
        "x86_64": [
          "python3-3.11.6-16.oe2403sp2.x86_64.rpm",
          "python3-debug-3.11.6-16.oe2403sp2.x86_64.rpm",
          "python3-debuginfo-3.11.6-16.oe2403sp2.x86_64.rpm",
          "python3-debugsource-3.11.6-16.oe2403sp2.x86_64.rpm",
          "python3-devel-3.11.6-16.oe2403sp2.x86_64.rpm",
          "python3-tkinter-3.11.6-16.oe2403sp2.x86_64.rpm",
          "python3-unversioned-command-3.11.6-16.oe2403sp2.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS-SP2",
        "name": "python3",
        "purl": "pkg:rpm/openEuler/python3\u0026distro=openEuler-24.03-LTS-SP2"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.11.6-16.oe2403sp2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "Medium"
  },
  "details": "Python combines remarkable power with very clear syntax. It has modules, classes, exceptions, very high level dynamic data types, and dynamic typing. There are interfaces to many system calls and libraries, as well as to various windowing systems. New built-in modules are easily written in C or C++ (or other languages, depending on the chosen implementation). Python is also usable as an extension language for applications written in other languages that need easy-to-use scripting or automation interfaces.\r\n\r\nSecurity Fix(es):\n\nDuring an address list folding when a separating comma ends up on a folded line and that line is to be unicode-encoded then the separator itself is also unicode-encoded. Expected behavior is that the separating comma remains a plan comma. This can result in the address header being misinterpreted by some mail servers.(CVE-2025-1795)\n\nThere is an issue in CPython when using `bytes.decode(\u0026quot;unicode_escape\u0026quot;, error=\u0026quot;ignore|replace\u0026quot;)`. If you are not using the \u0026quot;unicode_escape\u0026quot; encoding or an error handler your usage is not affected. To work-around this issue you may stop using the error= handler and instead wrap the bytes.decode() call in a try-except catching the DecodeError.(CVE-2025-4516)",
  "id": "OESA-2025-2302",
  "modified": "2026-08-06T11:09:22Z",
  "published": "2025-09-19T11:09:22Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2025-2302"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-1795"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-4516"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "python3 security update",
  "upstream": [
    "CVE-2025-1795",
    "CVE-2025-4516"
  ]
}

OESA-2025-2306 (CVE-2025-1795)

Vulnerability from osv_openeuler – Published: 2025-09-19 11:09 – Updated: 2026-08-06 11:09 – Source website

Summary

python3 security update

Details

Security Fix(es):

Severity

5.1 (Medium)


                    
                      CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

References

URL

Type

	https://www.openeuler.org/zh/security/security-bu…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2025-1795	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2025-4516	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "python3-3.11.6-16.oe2403sp1.aarch64.rpm",
          "python3-debug-3.11.6-16.oe2403sp1.aarch64.rpm",
          "python3-debuginfo-3.11.6-16.oe2403sp1.aarch64.rpm",
          "python3-debugsource-3.11.6-16.oe2403sp1.aarch64.rpm",
          "python3-devel-3.11.6-16.oe2403sp1.aarch64.rpm",
          "python3-tkinter-3.11.6-16.oe2403sp1.aarch64.rpm",
          "python3-unversioned-command-3.11.6-16.oe2403sp1.aarch64.rpm"
        ],
        "noarch": [
          "python3-help-3.11.6-16.oe2403sp1.noarch.rpm"
        ],
        "src": [
          "python3-3.11.6-16.oe2403sp1.src.rpm"
        ],
        "x86_64": [
          "python3-3.11.6-16.oe2403sp1.x86_64.rpm",
          "python3-debug-3.11.6-16.oe2403sp1.x86_64.rpm",
          "python3-debuginfo-3.11.6-16.oe2403sp1.x86_64.rpm",
          "python3-debugsource-3.11.6-16.oe2403sp1.x86_64.rpm",
          "python3-devel-3.11.6-16.oe2403sp1.x86_64.rpm",
          "python3-tkinter-3.11.6-16.oe2403sp1.x86_64.rpm",
          "python3-unversioned-command-3.11.6-16.oe2403sp1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS-SP1",
        "name": "python3",
        "purl": "pkg:rpm/openEuler/python3\u0026distro=openEuler-24.03-LTS-SP1"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.11.6-16.oe2403sp1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "Medium"
  },
  "details": "Python combines remarkable power with very clear syntax. It has modules, classes, exceptions, very high level dynamic data types, and dynamic typing. There are interfaces to many system calls and libraries, as well as to various windowing systems. New built-in modules are easily written in C or C++ (or other languages, depending on the chosen implementation). Python is also usable as an extension language for applications written in other languages that need easy-to-use scripting or automation interfaces.\r\n\r\nSecurity Fix(es):\n\nDuring an address list folding when a separating comma ends up on a folded line and that line is to be unicode-encoded then the separator itself is also unicode-encoded. Expected behavior is that the separating comma remains a plan comma. This can result in the address header being misinterpreted by some mail servers.(CVE-2025-1795)\n\nThere is an issue in CPython when using `bytes.decode(\u0026quot;unicode_escape\u0026quot;, error=\u0026quot;ignore|replace\u0026quot;)`. If you are not using the \u0026quot;unicode_escape\u0026quot; encoding or an error handler your usage is not affected. To work-around this issue you may stop using the error= handler and instead wrap the bytes.decode() call in a try-except catching the DecodeError.(CVE-2025-4516)",
  "id": "OESA-2025-2306",
  "modified": "2026-08-06T11:09:22Z",
  "published": "2025-09-19T11:09:22Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2025-2306"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-1795"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-4516"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "python3 security update",
  "upstream": [
    "CVE-2025-1795",
    "CVE-2025-4516"
  ]
}

OPENSUSE-SU-2025:15141-1

Vulnerability from csaf_opensuse - Published: 2025-05-20 00:00 - Updated: 2025-05-20 00:00

Summary

python314-3.14.0~b1-3.1 on GA media

Severity

Moderate

Scope

1 vulnerability in this advisory, including CVE-2025-4516.

CVE-2025-4516

5.1 (Medium)


                
                  CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Recommended: 24 products

Open the full advisory

OPENSUSE-SU-2025:15154-1

Vulnerability from csaf_opensuse - Published: 2025-05-23 00:00 - Updated: 2025-05-23 00:00

Summary

python313-3.13.3-3.1 on GA media

Severity

Moderate

Scope

1 vulnerability in this advisory, including CVE-2025-4516.

CVE-2025-4516

5.1 (Medium)


                
                  CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Recommended: 28 products

Open the full advisory

OPENSUSE-SU-2025:15163-1

Vulnerability from csaf_opensuse - Published: 2025-05-26 00:00 - Updated: 2025-05-26 00:00

Summary

python312-3.12.10-4.1 on GA media

Severity

Moderate

Scope

1 vulnerability in this advisory, including CVE-2025-4516.

CVE-2025-4516

5.1 (Medium)


                
                  CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Recommended: 28 products

Open the full advisory

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2025-4516 (GCVE-0-2025-4516)

ICSA-26-043-06

MSRC_CVE-2025-4516

OESA-2025-2288 (CVE-2025-4516)

OESA-2025-2289 (CVE-2025-4516)

OESA-2025-2290 (CVE-2025-1795)

OESA-2025-2302 (CVE-2025-1795)

OESA-2025-2306 (CVE-2025-1795)

OPENSUSE-SU-2025:15141-1

OPENSUSE-SU-2025:15154-1

OPENSUSE-SU-2025:15163-1

Tags

Sightings

Nomenclature

Related by attack behaviour