CVE-2025-4516: falha de média gravidade em Python Software Foundation CPython
Use-after-free in "unicode_escape" decoder with error handler
Publicada em · Atualizada em
Aviso por e-mail quando ela entrar no KEV, ganhar PoC pública ou subir de nota.
13Vexday Risk Score
Sem sinal de exploração. Nenhum artefato público de exploração conhecido até agora.
ssvc Trackcvss 5.9epss 0.2%
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.
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
Produtos afetados
Python Software Foundation · CPythonCVEs relacionadas — Python Software Foundation CPython
No mesmo produto, das mais perigosas para as menos.
CVE-2024-7592HIGHQuadratic complexity parsing cookies with backslashesEPSS 2.3%CVE-2024-6232HIGHRegular-expression DoS when parsing TarFile headersEPSS 2.2%CVE-2024-12254HIGHUnbounded memory buffering in SelectorSocketTransport.writelines()EPSS 1.9%CVE-2025-13836MEDIUMExcessive read buffering DoS in http.clientEPSS 1.7%CVE-2025-0938MEDIUMURL parser allowed square brackets in domain namesEPSS 1.6%CVE-2025-4138HIGHBypassing extraction filter to create symlinks to arbitrary targets outside extraction directoryEPSS 1.5%
Referências
https://github.com/python/cpython/commit/4398b788ffc1f954a2c552da285477d42a571292https://github.com/python/cpython/commit/6279eb8c076d89d3739a6edb393e43c7929b429dhttps://github.com/python/cpython/commit/69b4387f78f413e8c47572a85b3478c47eba8142https://github.com/python/cpython/commit/73b3040f592436385007918887b7e2132aa8431fhttps://github.com/python/cpython/commit/8d35fd1b34935221aff23a1ab69a429dd156be77https://github.com/python/cpython/commit/9f69a58623bd01349a18ba0c7a9cb1dad6a51e8ehttps://github.com/python/cpython/commit/ab9893c40609935e0d40a6d2a7307ea51aec598bhttps://github.com/python/cpython/issues/133767https://github.com/python/cpython/pull/129648https://mail.python.org/archives/list/security-announce@python.org/thread/L75IPBBTSCYEF56I2M4KIW353BB3AY74/http://www.openwall.com/lists/oss-security/2025/05/16/4http://www.openwall.com/lists/oss-security/2025/05/19/1