CVE-2025-53643

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 78% of all CVEs by exploit prediction. 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
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: None knownExposed: 0

A fix is available — apply it.

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.12.14, the Python parser is vulnerable to a request smuggling vulnerability due to not parsing trailer sections of an HTTP request. If a pure Python version of aiohttp is installed (i.e. without the usual C extensions) or AIOHTTP_NO_EXTENSIONS is enabled, then an attacker may be able to execute a request smuggling attack to bypass certain firewalls or proxy protections. Version 3.12.14 contains a patch for this issue.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
34(Track)
EG Risk 34/100SSVC: Track

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
Severity75% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
24%
KEV
Not listed

Published

July 14, 2025

Last Modified

August 14, 2025

References (2)

Vendor Advisories for CVE-2025-53643(8)

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

Patch Availability(8)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatansible-automation-platform-26/ee-supported-rhel9:17725084582026-03-06redhat
redhatpython3.12-aiohttp-0:3.13.3-1.el9pc2026-02-16redhat
redhatautomation-controller-0:4.6.25-1.el9ap2026-01-28redhat
redhatautomation-controller-0:4.7.8-1.el9ap2026-01-26redhat
redhatrhoai/odh-feature-server-rhel9:v2.25.1-17653545682025-12-17redhat
redhatopenshift-service-mesh/istio-proxyv2-rhel9:1.26.6-17643327232025-12-09redhat
redhatopenshift-service-mesh/istio-proxyv2-rhel9:1.24.6-17641816692025-12-09redhat
redhatrhoai/odh-feature-server-rhel9:v2.22.3-17635657652025-12-04redhat

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-aiohttp3.7.4-1, 3.7.4-1+deb11u13.7.4-1+deb11u2—
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-aiohttp3.11.16-13.12.15-1—
PyPI(1)
PackageVulnerable rangeFixed inDependents
aiohttp0.1 ... 3.9.5 (298 versions)3.12.14—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 31× 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 152 total refreshes for this CVE.

  1. 2026-09-18 19:27 UTCEPSS rescore
  2. 2026-09-18 19:27 UTCEPSS rescore
  3. 2026-09-17 19:29 UTCEPSS rescore
  4. 2026-09-16 14:07 UTCEPSS rescore
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  6. 2026-09-13 16:46 UTCEPSS rescore
  7. 2026-09-13 06:54 UTCOSV refresh
  8. 2026-09-12 15:00 UTCEPSS rescore
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  1. 2026-08-25 07:46 UTCOSV refresh
  2. 2026-08-24 14:16 UTCEPSS rescore
  3. 2026-08-24 09:22 UTCEPSS rescore
  4. 2026-08-23 00:18 UTCEPSS rescore
  5. 2026-08-21 23:48 UTCEPSS rescore
  6. 2026-08-20 22:54 UTCEPSS rescore
  7. 2026-08-19 17:03 UTCEPSS rescore
  8. 2026-08-18 13:47 UTCEPSS rescore
  9. 2026-08-17 13:46 UTCEPSS rescore
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  17. 2026-08-10 23:59 UTCEPSS rescore
  18. 2026-08-09 13:46 UTCEPSS rescore
  19. 2026-08-09 01:20 UTCOSV refresh
  20. 2026-08-08 16:36 UTCEPSS rescore
  21. 2026-08-07 16:26 UTCEPSS rescore
  22. 2026-08-06 13:46 UTCEPSS rescore
  23. 2026-08-05 19:16 UTCEPSS rescore
  24. 2026-08-04 15:09 UTCEPSS rescore
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  26. 2026-08-04 10:37 UTCEPSS rescore
  27. 2026-08-03 10:35 UTCEPSS rescore
  28. 2026-08-02 02:26 UTCEPSS rescore
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  30. 2026-07-30 16:27 UTCEPSS rescore
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  36. 2026-07-24 00:41 UTCOSV refresh
  37. 2026-07-23 14:18 UTCEPSS rescore
  38. 2026-07-23 02:58 UTCEG score recompute
  39. 2026-07-22 14:08 UTCEPSS rescore
  40. 2026-07-22 14:07 UTCEPSS rescore
  41. 2026-07-21 15:24 UTCEPSS rescore
  42. 2026-07-20 17:08 UTCEPSS rescore
  43. 2026-07-19 14:30 UTCEPSS rescore
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  45. 2026-07-19 02:28 UTCEPSS rescore
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  48. 2026-07-15 16:57 UTCEPSS rescore
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  52. 2026-07-13 22:29 UTCEPSS rescore
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  55. 2026-07-12 05:46 UTCEPSS rescore
  56. 2026-07-11 08:27 UTCEPSS rescore
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  58. 2026-07-09 19:09 UTCEPSS rescore
  59. 2026-07-08 15:15 UTCEPSS rescore
  60. 2026-07-07 13:45 UTCEPSS rescore
  61. 2026-07-06 19:13 UTCOSV refresh
  62. 2026-07-06 16:27 UTCEPSS rescore
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  75. 2026-06-28 04:55 UTCEPSS rescore

Frequently asked(5)

What is CVE-2025-53643?
CVE-2025-53643 is a high vulnerability published on July 14, 2025. AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.12.14, the Python parser is vulnerable to a request smuggling vulnerability due to not parsing trailer sections of an HTTP request. If a pure Python version of aiohttp is installed (i.e. without the…
When was CVE-2025-53643 disclosed?
CVE-2025-53643 was first published in the National Vulnerability Database on July 14, 2025, with the most recent update on August 14, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-53643 actively exploited?
CVE-2025-53643 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 75.8% of all scored CVEs.
What is the CVSS score of CVE-2025-53643?
CVE-2025-53643 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2025-53643?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-53643, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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