CVE-2026-69243

MEDIUMPre-NVD 6.36.3
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This medium-severity CVE scores 6.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4% (38th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
Trending — 4 sources updated this week

Also known asEUVD-2026-52436 (ENISA EUVD) · GHSA-mfx4-hv73-q22v (GitHub Security Advisories)Source: ENISA EUVD

6.3EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • 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 29/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity63% × 45%
Impact severity (EG Severity): CVSS 6.3 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.4% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.4%
EPSS %ILE
38th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (6.3): severity, escalated by confirmed exploitation. This CVE's 6.3 is its impact severity (EG Severity), not escalated.

EG Severity
6.3 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source · CVSS v3.0 or v3.1
EG Likelihood
0.4% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-31). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track 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). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

August 3, 2026

Last Modified

October 23, 2026

Advisory Details (3)

Auto-updated Aug 3, 2026
Patch available. Sources: github, github_commit, github_pr.
GitHub advisoryMentions a patch (unverified)

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

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

[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

Patch Availability(31)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatansible-automation-platform-26/platform-resource-runner-rhel9:17919086202026-10-21redhat
redhatrhoai/odh-workbench-jupyter-trustyai-cpu-py312-rhel9:17918163162026-10-21redhat
redhatrhoai/odh-kserve-storage-initializer-rhel9:17912572892026-10-21redhat
redhatrhoai/odh-trustyai-nemo-guardrails-server-rhel9:17915561282026-10-19redhat
redhatansible-automation-platform-27/platform-resource-runner-rhel9:17912194132026-10-08redhat
redhatrhelai3/bootc-rocm-rhel9:17907918932026-10-05redhat
redhatrhelai3/disk-image-cuda-rhel9:17909541792026-10-05redhat
redhatrhelai3/bootc-rocm-rhel9:17906144472026-10-05redhat
redhatrhelai3/disk-image-cuda-rhel9:17909574172026-10-05redhat
redhatrhaiis/vllm-cuda-rhel9:17906217182026-09-30redhat
redhatrhoai/odh-trustyai-nemo-guardrails-server-rhel9:17895706742026-09-30redhat
redhatrhaiis/vllm-rocm-rhel9:17906217132026-09-30redhat
redhatrhaiis/model-opt-cuda-rhel9:17906217142026-09-30redhat
redhatrhaii/vllm-rocm-rhel9:17901096202026-09-23redhat
redhatrhaii/vllm-cpu-rhel9:17900757932026-09-23redhat
redhatrhaii/vllm-spyre-rhel9:17900761412026-09-23redhat
redhatrhaii/vllm-cuda-rhel9:17900901312026-09-23redhat
redhatrhoai/odh-ta-lmes-job-rhel9:17889358632026-09-21redhat
redhatrhaiis/model-opt-cuda-rhel9:17895082872026-09-17redhat
redhatrhaiis/vllm-rocm-rhel9:17895043712026-09-17redhat
redhatrhaiis/vllm-spyre-rhel9:17895024932026-09-17redhat
redhatsatellite/iop-insights-engine-rhel9:17892736262026-09-17redhat
redhatsatellite/iop-insights-engine-rhel9:17892603062026-09-17redhat
redhatrhaiis/vllm-cuda-rhel9:17895827762026-09-17redhat
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
pipaiohttp @ 3.14.2 (fixes <= 3.14.1)—ghsa

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 rangeFix by version rangeDependents
python-aiohttp3.10.0-1 ... 3.9.5-1 (41 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
python-aiohttp3.10.0-1 ... 3.9.5-1 (34 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
python-aiohttp3.11.16-1 ... 3.14.3-1 (16 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
python-aiohttp3.11.16-1 ... 3.14.1-5 (14 versions)
  • every version up to 3.14.3-1: fixed in 3.14.3-1
—
PyPI(1)
PackageVulnerable rangeFix by version rangeDependents
aiohttp0.1 ... 3.9.5 (308 versions)
  • every version up to 3.14.2: fixed in 3.14.2
—

Weakness Classification(1)

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

Additional Vendor Advisories

(18)

Data Freshness Timeline

(refreshed 11× in last 7d / 50× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 194 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 94 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  2. 2026-11-01 07:40 UTCGHSA enrichmentGHSA-mfx4-hv73-q22v · GitHub severity MODERATE
  3. 2026-11-01 07:40 UTCEG score recompute
  4. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  5. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  6. 2026-10-29 16:56 UTCEG score recompute
  7. 2026-10-29 16:56 UTCVendor advisory
  8. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  9. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  10. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  11. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  12. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  13. 2026-10-25 14:09 UTCEG score recompute
  14. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  15. 2026-10-23 21:32 UTCEG score recompute
  16. 2026-10-23 21:32 UTCVendor advisory
  17. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  18. 2026-10-22 19:31 UTCEG score recompute
  19. 2026-10-22 19:31 UTCVendor advisory
  20. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  21. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  22. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  23. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  24. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  25. 2026-10-18 03:19 UTCEG score recompute
Show 75 more
  1. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  2. 2026-10-16 16:43 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  3. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  4. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  5. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  6. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  7. 2026-10-12 15:44 UTCEG score recompute
  8. 2026-10-11 19:29 UTCEG score recompute
  9. 2026-10-11 16:45 UTCEG score recompute
  10. 2026-10-11 14:05 UTCEG score recompute
  11. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  12. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  13. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  14. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  15. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  16. 2026-10-06 23:45 UTCEG score recompute
  17. 2026-10-06 23:45 UTCVendor advisory
  18. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  19. 2026-10-05 19:47 UTCEG score recompute
  20. 2026-10-05 19:47 UTCVendor advisory
  21. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  22. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  23. 2026-10-04 06:17 UTCEG score recompute
  24. 2026-10-04 06:17 UTCVendor advisory
  25. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  26. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  27. 2026-10-02 10:17 UTCEG score recompute
  28. 2026-10-02 10:17 UTCVendor advisory
  29. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  30. 2026-10-01 02:32 UTCEG score recompute
  31. 2026-10-01 02:32 UTCVendor advisory
  32. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  33. 2026-09-29 06:32 UTCEG score recompute
  34. 2026-09-29 06:32 UTCVendor advisory
  35. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  36. 2026-09-27 18:14 UTCEG score recompute
  37. 2026-09-27 18:14 UTCVendor advisory
  38. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  39. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  40. 2026-09-25 04:45 UTCEG score recompute
  41. 2026-09-25 04:45 UTCVendor advisory
  42. 2026-09-24 02:15 UTCEG score recompute
  43. 2026-09-24 02:15 UTCVendor advisory
  44. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  45. 2026-09-23 03:03 UTCEG score recompute
  46. 2026-09-23 03:03 UTCVendor advisory
  47. 2026-09-22 03:52 UTCEG score recompute
  48. 2026-09-22 03:52 UTCVendor advisory
  49. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  50. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  51. 2026-09-20 03:25 UTCEG score recompute
  52. 2026-09-20 03:25 UTCVendor advisory
  53. 2026-09-19 03:43 UTCEG score recompute
  54. 2026-09-19 03:43 UTCVendor advisory
  55. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  56. 2026-09-18 03:40 UTCEG score recompute
  57. 2026-09-18 03:40 UTCVendor advisory
  58. 2026-09-17 04:29 UTCEG score recompute
  59. 2026-09-17 04:29 UTCVendor advisory
  60. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  61. 2026-09-16 05:18 UTCEG score recompute
  62. 2026-09-16 05:18 UTCVendor advisory
  63. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  64. 2026-09-15 01:48 UTCVendor advisory
  65. 2026-09-13 18:46 UTCEG score recompute
  66. 2026-09-13 18:46 UTCVendor advisory
  67. 2026-09-12 19:35 UTCEG score recompute
  68. 2026-09-12 19:35 UTCVendor advisory
  69. 2026-09-11 20:24 UTCEG score recompute
  70. 2026-09-11 20:24 UTCVendor advisory
  71. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  72. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  73. 2026-09-10 20:38 UTCEG score recompute
  74. 2026-09-10 20:38 UTCVendor advisory
  75. 2026-09-10 06:49 UTCVendor advisory

Frequently asked(5)

What is CVE-2026-69243?
CVE-2026-69243 is a medium-severity vulnerability; its CVE record was 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 the CVE record for CVE-2026-69243 published?
The CVE record for CVE-2026-69243 was published on August 3, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of October 23, 2026; the record at its source may have been updated since.
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 (38th 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.

Dependency Blast Radius

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