Which versions of Python are affected by CVE-2026-3644?

CVE-2026-3644 presents moderate security risk, a input validation vulnerability rated CVSS 6.0. Exploitation could compromise the security of affected deployments.. A patch is available.

How to fix or mitigate CVE-2026-3644?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

Python CVE-2026-3644

Q: What is the CVSS score of CVE-2026-3644?

CVE-2026-3644 has a CVSS 4.0 base score of 6.0 (Medium). CVSS vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/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 exploitation probability: 0.1%.

EUVD-2026-12484 MEDIUM

Improper Input Validation (CWE-20)

2026-03-16 cna@python.org

Authentication Bypass Python

6.0

CVSS 4.0 · Vendor: python

Severity by source

Vendor (python) PRIMARY

6.0 MEDIUM

CVSS:4.0/AV:N/AC:L/AT:P/PR:L/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

SUSE

6.5 MEDIUM

AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Red Hat

5.4 MEDIUM

qualitative

Primary rating from Vendor (python).

CVSS VectorVendor: python

CVSS:4.0/AV:N/AC:L/AT:P/PR:L/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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Lifecycle Timeline

Patch available

Apr 16, 2026 - 05:29 EUVD

3.15.0

EUVD ID Assigned

Mar 16, 2026 - 18:30 euvd

EUVD-2026-12484

Analysis Generated

Mar 16, 2026 - 18:30 vuln.today

CVE Published

Mar 16, 2026 - 18:16 nvd

MEDIUM 6.0

DescriptionCVE.org

The fix for CVE-2026-0672, which rejected control characters in http.cookies.Morsel, was incomplete. The Morsel.update(), |= operator, and unpickling paths were not patched, allowing control characters to bypass input validation. Additionally, BaseCookie.js_output() lacked the output validation applied to BaseCookie.output().

AnalysisAI

CVE-2026-3644 is a security vulnerability (CVSS 6.0). Remediation should follow standard vulnerability management procedures.

Technical ContextAI

CWE-20 (Improper Input Validation).

RemediationAI

Monitor vendor channels for patch availability.

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Vendor StatusVendor

SUSE

Severity: Medium

Product	Status
Container suse/sl-micro/6.0/toolbox:latest	Affected
Container suse/sl-micro/6.1/baremetal-os-container:2.2.1-7.92	Affected
SUSE Linux Enterprise Desktop 15 SP7 SUSE Linux Enterprise High Performance Computing 15 SP7 SUSE Linux Enterprise Server 15 SP7 SUSE Linux Enterprise Server for SAP Applications 15 SP7	Fixed
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS	Fixed
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS	Fixed

CVE-2026-3644 vulnerability details – vuln.today

Back

Python CVE-2026-3644

Severity by source

CVSS VectorVendor: python

Lifecycle Timeline

DescriptionCVE.org

AnalysisAI

Technical ContextAI

RemediationAI

More in Python

Same weakness CWE-20 – Improper Input Validation

Same technique Authentication Bypass

Vendor StatusVendor

SUSE

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External POC / Exploit Code