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CVE-2022-24801· NVD / CVE Program· CNA GitHub_M

HTTP Request Smuggling in twisted.web

Noroxi assessment

Priority: Monitor (action score 33/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 2.8% (FIRST EPSS); higher than 86.3% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. Special conditions such as timing or configuration are required.
  • Fixed version: twisted (Debian:12) 22.4.0-1; twisted (Debian:9) 16.6.0-2+deb9u3; python-Twisted (openSUSE:Tumbleweed) 22.2.0-1.1.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to twisted (Debian:12) 22.4.0-1; twisted (Debian:9) 16.6.0-2+deb9u3; python-Twisted (openSUSE:Tumbleweed) 22.2.0-1.1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Twisted is an event-based framework for internet applications, supporting Python 3.6+. Prior to version 22.4.0rc1, the Twisted Web HTTP 1.1 server, located in the `twisted.web.http` module, parsed several HTTP request constructs more leniently than permitted by RFC 7230. This non-conformant parsing can lead to desync if requests pass through multiple HTTP parsers, potentially resulting in HTTP request smuggling. Users who may be affected use Twisted Web's HTTP 1.1 server and/or proxy and also pass requests through a different HTTP server and/or proxy. The Twisted Web client is not affected. The HTTP 2.0 server uses a different parser, so it is not affected. The issue has been addressed in Twisted 22.4.0rc1. Two workarounds are available: Ensure any vulnerabilities in upstream proxies have been addressed, such as by upgrading them; or filter malformed requests by other means, such as configuration of an upstream proxy.

HighCVSS 8.1 · v3.1—No exploit Fix available
Published
Apr 4, 2022
Updated
Jun 17, 2026
EPSS
2.8% · 86th percentile

Report tools

JSON

Action score

33

Monitor

Low priority for now.

CVSS
32 / 40 · 8.1 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 2.8%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
8.1
CNA · GitHub_M
8.1
agree

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2022-24801

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
twistedtwisted
debiandebian linux
fedoraprojectfedora
oraclezfs storage appliance kit

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • debian debian linux9.0
  • fedoraproject fedora35
  • fedoraproject fedora36
  • oracle zfs storage appliance kit8.8
  • twisted twistedbefore 22.4.0

Versions reported by the vendor

Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.

  • twisted twisted

    • <= 22.2.0affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12twistedbefore 22.4.0-122.4.0-1
Debian:9twistedbefore 16.6.0-2+deb9u316.6.0-2+deb9u3
openSUSE:Tumbleweedpython-Twistedbefore 22.2.0-1.122.2.0-1.1
PyPItwistedbefore 22.4.022.4.0
Red Hat:enterprise_linux:7::clientpython-twisted-webbefore 0:12.1.0-8.el7_90:12.1.0-8.el7_9
Red Hat:openstack:16.2::el8python-twistedbefore 0:16.4.1-20.el8ost0:16.4.1-20.el8ost
Red Hat:openstack:16.2::el8python-twisted-debugsourcebefore 0:16.4.1-20.el8ost0:16.4.1-20.el8ost
Red Hat:openstack:16.2::el8python3-twistedbefore 0:16.4.1-20.el8ost0:16.4.1-20.el8ost
Red Hat:openstack:16.2::el8python3-twisted-debuginfobefore 0:16.4.1-20.el8ost0:16.4.1-20.el8ost
SUSE:HPE Helion OpenStack 8python-Twistedbefore 15.2.1-9.14.115.2.1-9.14.1
SUSE:Linux Enterprise Module for Package Hub 15 SP3python-Twistedbefore 19.10.0-150200.3.9.119.10.0-150200.3.9.1
SUSE:Linux Enterprise Module for Package Hub 15 SP3python-Twistedbefore 19.10.0-150200.3.9.119.10.0-150200.3.9.1

Same product

twisted: all records

Other highest-scoring records for the same primary product.

  • CVE-2020-10109In Twisted Web through 19.10.0, there was an HTTP request splitting vulnerability.
    40Plan
  • CVE-2020-10108In Twisted Web through 19.10.0, there was an HTTP request splitting vulnerability.
    40Plan
  • CVE-2024-41671twisted.web has disordered HTTP pipeline response
    33Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2022-21712Feb 7, 2022 · Cookie and header exposure in twisted
    30Monitor
  • ← EarlierCVE-2022-21716Mar 3, 2022 · Buffer Overflow in Twisted
    31Monitor
  • Later →CVE-2022-39348Oct 26, 2022 · Twisted vulnerable to NameVirtualHost Host header injection
    21Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:twisted22.4.0-1 · Debian:12Package registry (OSV)
opensuse:python-Twisted19.10.0-150200.3.9.1 · openSUSE:Leap 15.3Package registry (OSV)
PyPI:twisted22.4.0Package registry (OSV)
red hat:python-twisted0:16.4.1-20.el8ost · Red Hat:openstack:16.2::el8Package registry (OSV)
red hat:python-twisted-debugsource0:16.4.1-20.el8ost · Red Hat:openstack:16.2::el8Package registry (OSV)
red hat:python-twisted-web0:12.1.0-8.el7_9 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:python3-twisted0:16.4.1-20.el8ost · Red Hat:openstack:16.2::el8Package registry (OSV)
red hat:python3-twisted-debuginfo0:16.4.1-20.el8ost · Red Hat:openstack:16.2::el8Package registry (OSV)
suse:python-Twisted19.10.0-150200.3.9.1 · SUSE:Linux Enterprise Module for Package Hub 15 SP3Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-444 · Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (6 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records