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PythonApplication

CVE-2022-0391

HIGH · 7.5 CVSS v3.1 Published 2022-02-09
Fix available
A fix is available. Upgrade to 3.6.14 / 3.7.11 or later.
See remediation →
84/100
Remediation priority · High
Public exploit Remotely reachable No privileges Zero-click Patch available

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
A flaw was found in Python, specifically within the urllib.parse module. This module helps break Uniform Resource Locator (URL) strings into components. The issue involves how the urlparse method does not sanitize input and allows characters like '\r' and '\n' in the URL path. This flaw allows an attacker to input a crafted URL, leading to injection attacks. This flaw affects Python versions prior to 3.10.0b1, 3.9.5, 3.8.11, 3.7.11 and 3.6.14.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis
How this class of weakness works · CWE-74

Untrusted input crosses into a downstream interpreter — SQL, a shell, an HTML page, an LDAP query — without being kept separate from the commands around it, so the attacker's data is read as instructions. This is the parent class behind SQL injection, cross-site scripting, and command injection alike. The durable fix is the same everywhere: keep data and code apart at every boundary, using parameterisation or context-aware encoding rather than building interpreted strings by concatenation.

General guidance for the injection class — the official description and references above are authoritative for this specific CVE. Want a bespoke review and a reviewed fix? Ask our team →

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
PythonApplication
Affected:< 3.6.14>= 3.7.0, < 3.7.11>= 3.8.0, < 3.8.11>= 3.9.0, < 3.9.5= 3.10.0
FedoraOperating system
Affected:= 34= 35
HTTP ServerWeb server / proxy
Affected:= 12.2.1.3.0= 12.2.1.4.0
Active Iq Unified ManagerApplication
Affected:all versions
HciApplication
Affected:all versions
Management Services For Element SoftwareApplication
Affected:all versions
Ontap Select Deploy Administration UtilityApplication
Affected:all versions
Solidfire\, Enterprise Sds \& Hci Storage NodeApplication
Affected:all versions

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 3.6.14 / 3.7.11 / 3.8.11 or later
Fixed in 3.6.143.7.113.8.11
Vendor patch bugs.python.org →
Recommended fix High confidence

Python 3.6.14, 3.7.11, 3.8.11, or 3.9.5 (depending on your current minor version), or 3.10.0b1+

  1. Check current Python version using 'python3 --version' or 'python --version'
  2. Determine which Python minor version is currently in use (3.6.x, 3.7.x, 3.8.x, or 3.9.x)
  3. Upgrade Python to the fixed version for your minor branch: For 3.6.x → 3.6.14; For 3.7.x → 3.7.11; For 3.8.x → 3.8.11; For 3.9.x → 3.9.5; For 3.10.x → 3.10.0b1 or later
  4. On Debian/Ubuntu: 'sudo apt update && sudo apt install python3' or specific version via apt
  5. On RHEL/CentOS: 'sudo yum update python3' or 'sudo dnf update python3'
  6. On Fedora: 'sudo dnf update python3'
  7. Verify the fix by running 'python3 --version' to confirm the updated version
  8. Test that applications using urllib.parse still function correctly after upgrade
Caveat Minor version point releases typically have minimal breaking changes; however, test application compatibility after upgrading

Generated from the published advisory — verify against the referenced sources before acting.

We can perform the upgrade in your staging environment and verify nothing breaks — typical engagement from $1,950. Get the upgrade done

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2022-0391 in production — separate from our analysis above.

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
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