Description
When folding a long comment in an email header containing exclusively unfoldable characters, the parenthesis would not be preserved. This could be used for injecting headers into email messages where addresses are user-controlled and not sanitized.
Published: 2026-01-20
Score: 5.7 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-4455-1 python3.9 security update
Ubuntu USN Ubuntu USN USN-8018-1 Python vulnerabilities
History

Tue, 03 Mar 2026 14:45:00 +0000


Mon, 02 Mar 2026 18:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-93

Mon, 02 Feb 2026 23:15:00 +0000


Mon, 26 Jan 2026 14:45:00 +0000


Thu, 22 Jan 2026 00:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-140
References
Metrics threat_severity

None

cvssV3_1

{'score': 4.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:H/A:N'}

threat_severity

Moderate


Wed, 21 Jan 2026 17:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 21 Jan 2026 11:30:00 +0000

Type Values Removed Values Added
First Time appeared Python
Python cpython
Vendors & Products Python
Python cpython

Tue, 20 Jan 2026 22:45:00 +0000


Tue, 20 Jan 2026 21:45:00 +0000


Tue, 20 Jan 2026 21:30:00 +0000

Type Values Removed Values Added
Description When folding a long comment in an email header containing exclusively unfoldable characters, the parenthesis would not be preserved. This could be used for injecting headers into email messages where addresses are user-controlled and not sanitized.
Title Folding email comments of unfoldable characters doesn't preserve parenthesis
References
Metrics cvssV4_0

{'score': 5.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: PSF

Published:

Updated: 2026-03-03T14:41:28.324Z

Reserved: 2025-10-07T21:04:42.377Z

Link: CVE-2025-11468

cve-icon Vulnrichment

Updated: 2026-01-21T15:48:39.281Z

cve-icon NVD

Status : Deferred

Published: 2026-01-20T22:15:50.690

Modified: 2026-04-15T00:35:42.020

Link: CVE-2025-11468

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-01-20T21:09:11Z

Links: CVE-2025-11468 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-01-21T11:18:54Z

Weaknesses