CVE Watch14 de out. de 2026

CVE-2021-23336

The package python/cpython from 0 and before 3.6.13, from 3.7.0 and before 3.7.10, from 3.8.0 and before 3.8.8, from 3.9.0 and before 3.9.2

CVSS

5.9

Média

EPSS

40.7%

p99

KEV

—

Exploit Today

0-100

Publicado: 15 de fev. de 2021 · Última mod.: 14 de out. de 2026 · CWE-444

EPSS · 30d

40.7%EPSS · 30 dias40.7%

2026-10-112026-11-08

Descrição técnica

The package python/cpython from 0 and before 3.6.13, from 3.7.0 and before 3.7.10, from 3.8.0 and before 3.8.8, from 3.9.0 and before 3.9.2 are vulnerable to Web Cache Poisoning via urllib.parse.parse_qsl and urllib.parse.parse_qs by using a vector called parameter cloaking. When the attacker can separate query parameters using a semicolon (;), they can cause a difference in the interpretation of the request between the proxy (running with default configuration) and the server. This can result in malicious requests being cached as completely safe ones, as the proxy would usually not see the semicolon as a separator, and therefore would not include it in a cache key of an unkeyed parameter.

Referências oficiais

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