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CVE-2026-0864

Configuration Injection via Carriage Return (\r) in write() method

CVSS score

4.1

EPSS probability

%0.1

Risk score

0.0

Published

3 mo ago

OverviewPublic Exploits (0)NewsroomVulnerability Timeline
Official patch verified

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Vulnerability description

DayBreach CVE AI Research

CVE-2026-0864 has vendor, distribution, patch and security-source records on file. We can compare them and prepare an explanation linked to the evidence.

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.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-0864 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1Python Software FoundationCPython View
2pythonpython View
3pythonpython View
4pythonpython View
5pythonpython View
6pythonpython View
7pythonpython View
Total affected vendors: 2|Products: 7

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCOREVERSIONSEVERITYVECTORSOURCE
5.5CVSS V31MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:NNVD
4.1CVSS V40MEDIUMCVSS: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:XNVD
4.1CVSS V4_0MEDIUMCVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:NCVE CNA

Patch and Remediation Guide

Solution & Remediation Advisory

Patch verified

26 doğrulanmış yama veya düzeltilmiş sürüm kanıtı bulundu.

nvd

NVD tarafından Patch olarak etiketlenmiş referans

Open source
nvd

NVD tarafından Patch olarak etiketlenmiş referans

Open source
nvd

NVD tarafından Patch olarak etiketlenmiş referans

Open source
nvd

NVD tarafından Patch olarak etiketlenmiş referans

Open source
nvd

NVD tarafından Patch olarak etiketlenmiş referans

Open source
nvd

NVD tarafından Patch olarak etiketlenmiş referans

Open source
nvd

NVD tarafından Patch olarak etiketlenmiş referans

Open source
nvd

NVD tarafından Patch olarak etiketlenmiş referans

Open source
nvd

NVD tarafından Patch olarak etiketlenmiş referans

Open source
cvelist

CNA çözüm referansı

Open source
cvelist

CNA çözüm referansı

Open source
cvelist

CNA çözüm referansı

Open source
Confirm the affected product and version against the source evidence above.
Restrict access to internet-facing services and apply network segmentation.
Apply the official update named in the evidence only to the matching product and version.
Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-0864 is associated with the following CWEs:

CWE-74: Common Weakness Enumeration Entry CWE-74

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-0864 weaknesses.

CAPEC-66: SQL InjectionCAPEC-126: Path TraversalCAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureYerel erişim
PermissionsHigh
User—

Official Sources and Advisories

https://github.com/python/cpython/pull/151559patchhttps://mail.python.org/archives/list/security-announce@python.org/thread/CV4NE6AFCRJL7XQOHX7J5TSDHUWVWGJS/vendor-advisoryhttps://github.com/python/cpython/issues/143927vendor-advisoryhttps://github.com/python/cpython/commit/5858e42c539dac8394636a6e9b30472b8994851fpatchhttps://github.com/python/cpython/commit/0adb386f6e68eb2e73d32e19f235d012df009528patchhttps://github.com/python/cpython/commit/71f2e02a52d47417a6fd69f456346cd8aa7aca98patchhttps://github.com/python/cpython/commit/aaf850fd333cd89e9aada03d92aaa788a6cb1bb8patchhttps://github.com/python/cpython/commit/db4a157c790479710a1a840d7937c5c815a6f8b6patchhttps://github.com/python/cpython/commit/12dcbd74d3563016a8cb8c47e4898889f34f74ddpatchhttps://github.com/python/cpython/commit/274de100bbf4345bd0c23ef5b446722e9e636908patch

CVSS Vector Radar Chart

4.1 / 10
Attack VectorLocalComplexityLowPrivilegesHighUser Interact.RequiredConfidentialityLowIntegrityNoneAvailabilityNone

Vulnerability Scoring Details

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
Attack VectorLocal
Attack ComplexityLow
Privileges RequiredHigh privileges
User InteractionP
Confidentiality (Gizlilik)Low
Integrity (Bütünlük)P
Availability (Erişilebilirlik)None

Yama doğrulandı

26 doğrulanmış yama veya düzeltilmiş sürüm kanıtı bulundu.

Follow the vendor

PS
Python Software Foundation logo
Python Software Foundation
P
python logo
python

Weakness Type (CWE & CAPEC)

CWE-74

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