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Database

Technical information leak In python3

Description

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.

Mitigation

Update Impact

Minimal update. May introduce new vulnerabilities or breaking changes.

Ecosystem
Component
Affected version
Patched versions

1-10 of 24

10

Aliases

1. CVE-2025-45162. NVD-2025-45163. OSV-ALPINE-2025-45164. OSV-2025-45165. OSV-DEBIAN-2025-45166. GCVE-2025-45167. SECURITY-CVE-2025-45168. SECURITY-TRACKER-CVE-2025-45169. https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/4xxx/CVE-2025-4516.json10. mail.python.org

References

1. http://www.openwall.com/lists/oss-security/2025/05/16/42. http://www.openwall.com/lists/oss-security/2025/05/19/13. https://github.com/python/cpython/issues/1337674. https://github.com/python/cpython/commit/4398b788ffc1f954a2c552da285477d42a5712925. https://github.com/python/cpython/commit/6279eb8c076d89d3739a6edb393e43c7929b429d6. https://github.com/python/cpython/commit/69b4387f78f413e8c47572a85b3478c47eba81427. https://github.com/python/cpython/commit/73b3040f592436385007918887b7e2132aa8431f8. https://github.com/python/cpython/commit/8d35fd1b34935221aff23a1ab69a429dd156be779. https://github.com/python/cpython/commit/9f69a58623bd01349a18ba0c7a9cb1dad6a51e8e10. https://github.com/python/cpython/commit/ab9893c40609935e0d40a6d2a7307ea51aec598b11. https://github.com/python/cpython/pull/129648

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