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CVE-2025-15366

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Date: January 20, 2026

The imaplib module, when passed a user-controlled command, can have additional commands injected using newlines. Mitigation rejects commands containing control characters.

Severity Score

Related Resources (6)

https://github.com/python/cpython/issues/143921
https://github.com/python/cpython/pull/143922
https://mail.python.org/archives/list/security-announce@python.org/thread/DD7C7JZJYTBXMDOWKCEIEBJLBRU64OMR/
https://nvd.nist.gov/vuln/detail/CVE-2025-15366
https://github.com/python/cpython/commit/6262704b134db2a4ba12e85ecfbd968534f28b45
https://www.mend.io/vulnerability-database/CVE-2025-15366

Severity Score

Weakness Type (CWE)

Improper Neutralization of Special Elements used in a Command ('Command Injection')

CWE-77

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): HIGH
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): LOW
Integrity (I): HIGH
Availability (A): NONE

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