Name: CVE-2026-0864: Improper Neutralization of Special Elements in Output Used by a Downstream Component
Creator: Rapid7
Published: 2026-06-23T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2026-0864, CWE-74, CVSS 5.5, EPSS 0.00139

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.

CVSS Details

CVSS 4.0 Base Score: 4.1 (MEDIUM)
CVSS 4.0 Vector: (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/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)
CVSS 3.1 Base Score: 5.5
CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Alpine Linux	—	Upgrade python3	Aug 17, 2026	Jun 23, 2026
Amazon_linux_2023	—	Upgrade python3.14-libsUpgrade python3.11-libsUpgrade python3.14-debugUpgrade python3.11-debugsourceUpgrade python3.13-tkinterUpgrade python3.14-debuginfoUpgrade python3.14-freethreading-debugUpgrade python3-tkinterUpgrade python3-debugUpgrade python3-idleUpgrade python3Upgrade python3.14-freethreadingUpgrade python3.9-debuginfoUpgrade python3.13-freethreading-debugUpgrade python3-develUpgrade python3.14-tkinterUpgrade python3.11-idleUpgrade python3.14-freethreading-tkinterUpgrade python3.13-debuginfoUpgrade python3.14-freethreading-idleUpgrade python3.11-debuginfoUpgrade python3.14-idleUpgrade python3.14-freethreading-testUpgrade python3.13-develUpgrade python-unversioned-commandUpgrade python3.11-tkinterUpgrade python3.11-develUpgrade python3.13-testUpgrade python3.11Upgrade python3.11-testUpgrade python3.11-debugUpgrade python3.9-debugsourceUpgrade python3.14-freethreading-libsUpgrade python3.14-develUpgrade python3.13-freethreadingUpgrade python3.13-debugsourceUpgrade python3.13-debugUpgrade python3.14-testUpgrade python3.13-idleUpgrade python3.14Upgrade python3-libsUpgrade python3-testUpgrade python3.14-freethreading-develUpgrade python3.14-debugsourceUpgrade python3.13Upgrade python3.13-libs	Jul 21, 2026	Jun 23, 2026
Debian	—	Upgrade python3.13	Sep 21, 2026	Jun 23, 2026
Redhat_linux	—	No solution exists	Jul 17, 2026	Jun 23, 2026
Vmware Photon_os	—	Use 'tdnf update' to upgrade all packages to the latest version.	Oct 22, 2026	Jun 23, 2026

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CVSS Details

Covered by Rapid7

Prioritize with Active Threat Intelligence