CVE-2025-15366CWE-77command-injection

CVE-2025-15366

published January 21, 2026

CVSS

5.9

EPSS

Percentile

36.3

In the wild

Unconfirmed

What it is

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

The record

Technical detail

CVSS: 5.9 · NONE
CVSS v4.0: Not supplied
EPSS: 0.00431 · 36.3th percentile
Weakness: CWE-77 · Improper Neutralization of Special Elements used in a Command ('Command Injection')
Published: 2026-01-21T03:15Z

References (8)

https://github.com/python/cpython/commit/298182272a740ce2016aee2f54acbd0bba1944c1 · [email protected]https://github.com/python/cpython/commit/6262704b134db2a4ba12e85ecfbd968534f28b45 · [email protected]https://github.com/python/cpython/commit/71926d943c05bde79bd2a866933103541d91b6a2 · [email protected]https://github.com/python/cpython/commit/d0921efb665aff26b378f495e5ff84f7e3fe649d · [email protected]https://github.com/python/cpython/commit/f2cd7ef89aa8a0dcbc7283bbd39548b76f2a736a · [email protected]https://github.com/python/cpython/issues/143921 · [email protected]https://github.com/python/cpython/pull/143922 · [email protected]https://mail.python.org/archives/list/[email protected]/thread/DD7C7JZJYTBXMDOWKCEIEBJLBRU64OMR/ · [email protected]

EPSS history

Timeline

20 JAN 21:40Z
IMAP command injection in user-controlled commands
cvelistv5