IMAP command injection in user-controlled commands

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2025-15366
StatePUBLISHED
AssignerPSF
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-01-20 22:15:51 UTC
Updated2026-07-09 18:16:48 UTC
DescriptionThe imaplib module, when passed a user-controlled command, can have additional commands injected using newlines. Mitigation rejects commands containing control characters.

Risk And Classification

Primary CVSS: v4.0 5.9 MEDIUM from [email protected]

CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS: 0.003600000 probability, percentile 0.281320000 (date 2026-07-13)

Problem Types: CWE-77 | CWE-77 CWE-77 Improper Neutralization of Special Elements used in a Command ('Command Injection')

VersionSourceTypeScoreSeverityVector
4.0[email protected]Secondary5.9MEDIUMCVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/C...
4.0CNACVSS5.9MEDIUMCVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
Present
Privileges Required
High
User Interaction
None
Confidentiality
Low
Integrity
High
Availability
None
Sub Conf.
None
Sub Integrity
None
Sub Availability
None

CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Python Software Foundation CPython affected 3.15.0a6 python Not specified

References

ReferenceSourceLinkTags
github.com/python/cpython/commit/298182272a740ce2016aee2f54acbd0bba1944c1 [email protected] github.com
github.com/python/cpython/pull/143922 [email protected] github.com
github.com/python/cpython/commit/f2cd7ef89aa8a0dcbc7283bbd39548b76f2a736a [email protected] github.com
github.com/python/cpython/commit/71926d943c05bde79bd2a866933103541d91b6a2 [email protected] github.com
github.com/python/cpython/issues/143921 [email protected] github.com
github.com/python/cpython/commit/6262704b134db2a4ba12e85ecfbd968534f28b45 [email protected] github.com
mail.python.org/archives/list/[email protected]/thread/DD7C7JZJYTB... [email protected] mail.python.org
github.com/python/cpython/commit/d0921efb665aff26b378f495e5ff84f7e3fe649d [email protected] github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Omar M. Hasan (en)

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