CVE-2026-0864 | When using the "configparser" module to write configuration … | CVSS 4.1 MEDIUM

Description

When using the "configparser" module to write configuration files containing multi-line text values with carriage return characters (\r) the resulting file could be injected with unexpected keys and values if the attacker controls the written value.

Metadata

CVE ID: CVE-2026-0864
State: PUBLISHED
Assigner: PSF
Reserved: 2026-01-12 16:07 UTC
Published: 2026-06-23 17:42 UTC
Last updated: 2026-06-23 18:34 UTC
Primary CWE: CWE-74
CWE-74 Improper Neutralization of Special Elements in Output…
Vendor / Product: Python Software Foundation / CPython
Sources: cve.org · NVD

Severity & Metrics

4.1 MEDIUM CVSS 4.0

CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

SSVC — CISA Coordinator

Exploitation: none
Automatable: no
Tech. Impact: partial

Affected products (1)

Vendor	Product	Platform	Versions
Python Software Foundation	CPython	—	0 < 3.15.0

Weakness (CWE)

CWE	Source	Description
CWE-74	adp	CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

CVSS scores (1)

Score	Severity	Version	Source	Vector
4.1	MEDIUM	4.0	cna	CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

References (4)