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Red Hat Security Advisory

RHSA-2026:4463

python3.12 security update

Released 2026-03-12 · Red Hat rating Moderate · View on Red Hat →

Fixed in

Fixes 4 records

Priority LOW 29

The poplib module, when passed a user-controlled command, can have additional commands injected using newlines.

CVSS 4.0MEDIUM 5.9 Network High privileges No interaction EPSS 0.00377 Published 2026-01-20 Partial fix · 3.15.0a6 CWE-77
Priority LOW 29

The imaplib module, when passed a user-controlled command, can have additional commands injected using newlines.

CVSS 4.0MEDIUM 5.9 Network High privileges No interaction EPSS 0.00431 Published 2026-01-20 Partial fix · 3.13.15, 3.14.7 +1 CWE-77
Priority LOW 28

The email module, specifically the "BytesGenerator" class, didn’t properly quote newlines for email headers when serializing an email message allowing for header injection when an email is serialized.

CVSS 4.0MEDIUM 6.0 Network Low privileges No interaction EPSS 0.00573 Published 2026-01-23 Partial fix · 3.10.20, 3.11.15 +4 CWE-93
Priority LOW 27

User-controlled header names and values containing newlines can allow injecting HTTP headers.

CVSS 4.0MEDIUM 5.9 Network High privileges No interaction EPSS 0.00554 Published 2026-01-20 Partial fix · 3.10.20, 3.11.15 +4 CWE-74