CVE-2022-24801

HIGHNVD 8.18.1—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.1 under NVD CVSS v3. EPSS exploit probability: 2.8% (85th percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
8.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 2.8%CVSS: 8.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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.

CVSS v3
8.1
EG Score
8.1HIGHmedium confidence
EG Risk
38
EG Risk 38/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity81% × 45%
Exploitation3% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
2.8%
EPSS %ILE
86th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

April 4, 2022

Last Modified

November 25, 2024

Advisory Details (6)

Auto-updated Sep 13, 2026
Patch available. Sources: github_commit, github_release, github.
githubMentions a patch (unverified)

Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling') in twisted.web · Advisory · twisted/twisted · GitHub

https://github.com/twisted/twisted/security/advisories/GHSA-c2jg-hw38-jrqq
github_release Patch Available

Release 22.4.0rc1

Patch available: twisted/twisted twisted-22.4.0rc1 (pre-release)

https://github.com/twisted/twisted/releases/tag/twisted-22.4.0rc1
github_commit Patch Available

commit 592217e95136 (twisted/twisted)

Patch available: twisted/twisted twisted-22.4.0rc1 (contains commit 592217e95136)

https://github.com/twisted/twisted/commit/592217e951363d60e9cd99c5bbfd23d4615043ac
generic

[SECURITY] Fedora 36 Update: python-twisted-22.4.0-1.fc36 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GLKHA6WREIVAMBQD7KKWYHPHGGNKMAG6/
generic

[SECURITY] Fedora 35 Update: python-twisted-22.4.0-1.fc35 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7U6KYDTOLPICAVSR34G2WRYLFBD2YW5K/
genericMentions a patch (unverified)

[SECURITY] [DLA 2991-1] twisted security update

https://lists.debian.org/debian-lts-announce/2022/05/msg00003.html

Vendor Advisories for CVE-2022-24801(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(3)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntupython3-twisted (22.1.0-2ubuntu2.3) @ jammy2026-05-26ubuntu
redhatpython-twisted-web-0:12.1.0-8.el7_92022-06-07redhat
redhatpython-twisted-0:16.4.1-20.el8ost2022-04-29redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(6 across 6 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
twisted20.3.0-7
  • every version up to 20.3.0-7+deb11u1: fixed in 20.3.0-7+deb11u1
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
twisted—
  • every version up to 22.4.0-1: fixed in 22.4.0-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
twisted—
  • every version up to 22.4.0-1: fixed in 22.4.0-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
twisted—
  • every version up to 22.4.0-1: fixed in 22.4.0-1
—
Debian:9(1)
PackageVulnerable rangeFix by version rangeDependents
twisted16.6.0-2, 16.6.0-2+deb9u1, 16.6.0-2+deb9u2
  • every version up to 16.6.0-2+deb9u3: fixed in 16.6.0-2+deb9u3
—
PyPI(1)
PackageVulnerable rangeFix by version rangeDependents
twisted1.0.1 ... 9.0.0 (88 versions)
  • every version up to 22.4.0: fixed in 22.4.0
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(3)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 7× in last 7d / 24× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 171 total refreshes for this CVE.

  1. 2026-10-09 20:04 UTCEPSS rescore
  2. 2026-10-08 16:40 UTCEPSS rescore
  3. 2026-10-07 23:45 UTCEPSS rescore
  4. 2026-10-06 15:14 UTCEPSS rescore
  5. 2026-10-05 17:40 UTCEPSS rescore
  6. 2026-10-03 14:23 UTCEPSS rescore
  7. 2026-10-03 14:22 UTCEPSS rescore
  8. 2026-09-30 15:51 UTCEG score recompute
  9. 2026-09-30 15:00 UTCEPSS rescore
  10. 2026-09-29 15:15 UTCEPSS rescore
  11. 2026-09-28 13:48 UTCEPSS rescore
  12. 2026-09-27 13:41 UTCEPSS rescore
  13. 2026-09-26 00:22 UTCEPSS rescore
  14. 2026-09-25 01:54 UTCOSV refresh
  15. 2026-09-24 14:00 UTCEPSS rescore
  16. 2026-09-23 13:45 UTCEPSS rescore
  17. 2026-09-20 20:13 UTCEPSS rescore
  18. 2026-09-17 19:23 UTCEPSS rescore
  19. 2026-09-16 14:05 UTCEPSS rescore
  20. 2026-09-15 03:06 UTCEPSS rescore
  21. 2026-09-13 16:43 UTCEPSS rescore
  22. 2026-09-12 14:57 UTCEPSS rescore
  23. 2026-09-11 14:49 UTCEPSS rescore
  24. 2026-09-11 09:33 UTCEPSS rescore
  25. 2026-09-08 21:57 UTCEPSS rescore
Show 75 more
  1. 2026-09-07 15:58 UTCEPSS rescore
  2. 2026-09-06 13:45 UTCEPSS rescore
  3. 2026-09-05 17:21 UTCOSV refresh
  4. 2026-09-05 15:25 UTCEPSS rescore
  5. 2026-09-04 13:57 UTCEPSS rescore
  6. 2026-09-04 05:04 UTCEPSS rescore
  7. 2026-09-02 14:09 UTCEPSS rescore
  8. 2026-09-01 13:51 UTCEPSS rescore
  9. 2026-08-30 19:14 UTCEPSS rescore
  10. 2026-08-30 01:19 UTCEPSS rescore
  11. 2026-08-28 21:38 UTCEPSS rescore
  12. 2026-08-27 14:22 UTCEPSS rescore
  13. 2026-08-26 14:43 UTCEPSS rescore
  14. 2026-08-25 13:46 UTCEPSS rescore
  15. 2026-08-25 13:46 UTCEPSS rescore
  16. 2026-08-24 14:13 UTCEPSS rescore
  17. 2026-08-21 23:46 UTCEPSS rescore
  18. 2026-08-20 22:52 UTCEPSS rescore
  19. 2026-08-19 17:01 UTCEPSS rescore
  20. 2026-08-19 04:02 UTCOSV refresh
  21. 2026-08-18 13:45 UTCEPSS rescore
  22. 2026-08-17 13:44 UTCEPSS rescore
  23. 2026-08-16 14:53 UTCEPSS rescore
  24. 2026-08-16 02:11 UTCEPSS rescore
  25. 2026-08-15 01:27 UTCEPSS rescore
  26. 2026-08-13 21:57 UTCEPSS rescore
  27. 2026-08-12 13:48 UTCEPSS rescore
  28. 2026-08-09 13:44 UTCEPSS rescore
  29. 2026-08-08 16:34 UTCEPSS rescore
  30. 2026-08-07 16:24 UTCEPSS rescore
  31. 2026-08-06 13:44 UTCEPSS rescore
  32. 2026-08-05 19:15 UTCEPSS rescore
  33. 2026-08-04 10:34 UTCEPSS rescore
  34. 2026-08-03 23:57 UTCOSV refresh
  35. 2026-08-03 10:33 UTCEPSS rescore
  36. 2026-08-02 02:24 UTCEPSS rescore
  37. 2026-08-01 04:13 UTCEPSS rescore
  38. 2026-07-30 16:25 UTCEPSS rescore
  39. 2026-07-30 01:28 UTCEPSS rescore
  40. 2026-07-28 15:33 UTCEPSS rescore
  41. 2026-07-26 14:52 UTCEPSS rescore
  42. 2026-07-26 14:52 UTCEPSS rescore
  43. 2026-07-25 14:15 UTCEPSS rescore
  44. 2026-07-24 14:15 UTCEPSS rescore
  45. 2026-07-23 14:16 UTCEPSS rescore
  46. 2026-07-23 02:09 UTCEG score recompute
  47. 2026-07-22 22:56 UTCEG score recompute
  48. 2026-07-22 14:06 UTCEPSS rescore
  49. 2026-07-22 14:06 UTCEPSS rescore
  50. 2026-07-21 15:22 UTCEPSS rescore
  51. 2026-07-21 15:22 UTCEPSS rescore
  52. 2026-07-20 17:05 UTCEPSS rescore
  53. 2026-07-19 14:29 UTCEPSS rescore
  54. 2026-07-19 02:27 UTCEPSS rescore
  55. 2026-07-18 10:02 UTCEPSS rescore
  56. 2026-07-18 10:02 UTCEPSS rescore
  57. 2026-07-17 17:59 UTCOSV refresh
  58. 2026-07-16 17:00 UTCEPSS rescore
  59. 2026-07-16 17:00 UTCEPSS rescore
  60. 2026-07-15 16:56 UTCEPSS rescore
  61. 2026-07-15 16:56 UTCEPSS rescore
  62. 2026-07-15 01:58 UTCEPSS rescore
  63. 2026-07-15 01:58 UTCEPSS rescore
  64. 2026-07-13 22:27 UTCEPSS rescore
  65. 2026-07-13 06:11 UTCEPSS rescore
  66. 2026-07-13 06:11 UTCEPSS rescore
  67. 2026-07-12 05:44 UTCEPSS rescore
  68. 2026-07-11 08:25 UTCEPSS rescore
  69. 2026-07-09 19:07 UTCEPSS rescore
  70. 2026-07-08 15:12 UTCEPSS rescore
  71. 2026-07-07 13:44 UTCEPSS rescore
  72. 2026-07-06 16:25 UTCEPSS rescore
  73. 2026-07-06 16:25 UTCEPSS rescore
  74. 2026-07-06 02:21 UTCEPSS rescore
  75. 2026-07-05 02:28 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2022-24801?
CVE-2022-24801 is a high vulnerability published on April 4, 2022. 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…
When was CVE-2022-24801 disclosed?
CVE-2022-24801 was first published on April 4, 2022, with the most recent update on November 25, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2022-24801 actively exploited?
CVE-2022-24801 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2.8% probability of exploitation in the next 30 days (86th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2022-24801?
CVE-2022-24801 has a CVSS v3 base score of 8.1 (NVD).
How do I remediate CVE-2022-24801?
A fix for CVE-2022-24801 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2022-24801 are linked in the Vendor Advisories panel on this page.

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