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cpython: POP3 command injection in user-controlled commands

🗓️ 12 Mar 2026 13:40:42Reported by RedHatType 
redhat
 redhat🔗 access.redhat.com👁 7 Views

CPython POP3 command injection flaw in poplib: it does not reject control characters, enabling injection.

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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux8.10aarch64python3.110:3.11.13-5.el8_10python3.11-0:3.11.13-5.el8_10.aarch64.rpm
Red Hat Enterprise Linux8.10i686python3.110:3.11.13-5.el8_10python3.11-0:3.11.13-5.el8_10.i686.rpm
Red Hat Enterprise Linux8.10ppc64lepython3.110:3.11.13-5.el8_10python3.11-0:3.11.13-5.el8_10.ppc64le.rpm
Red Hat Enterprise Linux8.10s390xpython3.110:3.11.13-5.el8_10python3.11-0:3.11.13-5.el8_10.s390x.rpm
Red Hat Enterprise Linux8.10x86_64python3.110:3.11.13-5.el8_10python3.11-0:3.11.13-5.el8_10.x86_64.rpm
Red Hat Enterprise Linux8.10aarch64python3.11-debug0:3.11.13-5.el8_10python3.11-debug-0:3.11.13-5.el8_10.aarch64.rpm
Red Hat Enterprise Linux8.10i686python3.11-debug0:3.11.13-5.el8_10python3.11-debug-0:3.11.13-5.el8_10.i686.rpm
Red Hat Enterprise Linux8.10ppc64lepython3.11-debug0:3.11.13-5.el8_10python3.11-debug-0:3.11.13-5.el8_10.ppc64le.rpm
Red Hat Enterprise Linux8.10s390xpython3.11-debug0:3.11.13-5.el8_10python3.11-debug-0:3.11.13-5.el8_10.s390x.rpm
Red Hat Enterprise Linux8.10x86_64python3.11-debug0:3.11.13-5.el8_10python3.11-debug-0:3.11.13-5.el8_10.x86_64.rpm
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03 Jul 2026 00:46Current
5.7Medium risk
Vulners AI Score5.7
CVSS 45.9
EPSS0.00315
SSVC
CWE-77
poplib modulepost office protocolcontrol charactersinput validationcommand injectionsecurity flaw
7