CVE-2026-69243

MEDIUMPre-NVD 6.36.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4% (36th 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, secondary
Trending — Patch released this week
6.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 6.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.2, the HTTP parsers were vulnerable to a request smuggling attack relating to WebSocket upgrades. If using the server-side component, an attacker may be able to execute a request smuggling vulnerability using an edge case in the WebSocket upgrade procedure. A WebSocket upgrade request with a body could cause the parser to switch protocols before the complete request body was received, leaving trailing bytes to be handled as upgraded-protocol or pipelined data rather than normal HTTP body data. This issue is fixed in version 3.14.2.

CVSS v3
6.3
EG Score
6.3MEDIUMmedium confidence
EG Risk
29
EG Risk 29/100CISA 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
Severity63% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.4%
EPSS %ILE
36th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

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

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (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

August 3, 2026

Last Modified

September 10, 2026

Advisory Details (3)

Auto-updated Aug 3, 2026
Patch available. Sources: github, github_commit, github_pr.
github Patch Available

HTTP request smuggling via WebSocket upgrade · Advisory · aio-libs/aiohttp · GitHub

https://github.com/aio-libs/aiohttp/security/advisories/GHSA-mfx4-hv73-q22v
github_pr

[PR #13016/8ef76ab8 backport][3.14] Fix body reads after failed WS upgrade

Fix merged in aio-libs/aiohttp PR #13017 on 2026-06-30 — awaiting tagged release

https://github.com/aio-libs/aiohttp/pull/13017
github_commit

commit 6ae358f0983c (aio-libs/aiohttp)

Fix landed in aio-libs/aiohttp commit 6ae358f0983c — awaiting tagged release

https://github.com/aio-libs/aiohttp/commit/6ae358f0983c3f4d6f67692b2f8e65dc8e091c98

Vendor Advisories for CVE-2026-69243(20)

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

Patch Availability(23)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatrhaii/vllm-cpu-rhel9:17900757932026-09-23redhat
redhatrhaii/vllm-spyre-rhel9:17900761412026-09-23redhat
redhatrhaii/vllm-cuda-rhel9:17900901312026-09-23redhat
redhatrhaii/vllm-rocm-rhel9:17901096202026-09-23redhat
redhatrhoai/odh-ta-lmes-job-rhel9:17889358632026-09-21redhat
redhatsatellite/iop-insights-engine-rhel9:17892736262026-09-17redhat
redhatrhaiis/vllm-spyre-rhel9:17895024932026-09-17redhat
redhatrhaiis/vllm-rocm-rhel9:17895043712026-09-17redhat
redhatrhaiis/vllm-cuda-rhel9:17895827762026-09-17redhat
redhatrhaiis/model-opt-cuda-rhel9:17895082872026-09-17redhat
redhatsatellite/iop-insights-engine-rhel9:17892603062026-09-17redhat
redhatansible-automation-platform-27/hub-rhel9:17889187082026-09-14redhat
redhatrhoai/odh-workbench-jupyter-trustyai-cpu-py312-rhel9:17881858992026-09-08redhat
redhatpython3.12-aiohttp-0:3.14.3-1.el9pc2026-09-03redhat
redhatsatellite/iop-vulnerability-engine-rhel9:17881903822026-09-03redhat
redhatsatellite/iop-vulnerability-engine-rhel9:17881902242026-09-03redhat
redhatpython-aiohttp-0:3.14.3-1.el9pc2026-09-03redhat
redhatpython3.12-pulpcore-0:3.73.30-3.el9pc2026-09-03redhat
redhatrhoai/odh-workbench-jupyter-trustyai-cpu-py312-rhel9:17870735932026-08-27redhat
redhatpython3.12-aiohttp-0:3.14.3-1.el9ap2026-08-24redhat
redhatansible-automation-platform-27/lightspeed-rhel9:17872175312026-08-24redhat
redhatansible-automation-platform-26/lightspeed-rhel9:17872440792026-08-24redhat
redhatdiscovery/discovery-server-rhel9:17866385732026-08-13redhat

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

(5 across 5 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
python-aiohttp3.10.0-1 ... 3.9.5-1 (41 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
python-aiohttp3.10.0-1 ... 3.9.5-1 (33 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
python-aiohttp3.11.16-1 ... 3.14.1-5 (15 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
python-aiohttp3.11.16-1 ... 3.14.1-5 (14 versions)——
PyPI(1)
PackageVulnerable rangeFixed inDependents
aiohttp0.1 ... 3.9.5 (308 versions)3.14.2—

Weakness Classification(1)

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

Additional Vendor Advisories

(5)

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 14× in last 7d / 68× 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 137 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-69243?
CVE-2026-69243 is a medium vulnerability published on August 3, 2026. AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.2, the HTTP parsers were vulnerable to a request smuggling attack relating to WebSocket upgrades. If using the server-side component, an attacker may be able to execute a request smuggling vulnerability…
When was CVE-2026-69243 disclosed?
CVE-2026-69243 was first published on August 3, 2026, with the most recent update on September 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-69243 actively exploited?
CVE-2026-69243 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (36th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-69243?
CVE-2026-69243 has a CVSS base score of 6.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-69243?
A fix for CVE-2026-69243 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-69243 are linked in the Vendor Advisories panel on this page.

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