CVE-2026-34517 (GCVE-0-2026-34517)
Vulnerability from cvelistv5
Published
2026-04-01 20:14
Modified
2026-04-02 16:24
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Summary
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, for some multipart form fields, aiohttp read the entire field into memory before checking client_max_size. This issue has been patched in version 3.13.4.
References
| URL | Tags | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
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"metrics": [
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"id": "CVE-2026-34517",
"options": [
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"Exploitation": "none"
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"Automatable": "yes"
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{
"Technical Impact": "partial"
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],
"role": "CISA Coordinator",
"timestamp": "2026-04-02T15:13:50.407256Z",
"version": "2.0.3"
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"providerMetadata": {
"dateUpdated": "2026-04-02T16:24:18.699Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
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"cna": {
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{
"product": "aiohttp",
"vendor": "aio-libs",
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"metrics": [
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"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 2.7,
"baseSeverity": "LOW",
"privilegesRequired": "NONE",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U",
"version": "4.0",
"vulnAvailabilityImpact": "LOW",
"vulnConfidentialityImpact": "NONE",
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"problemTypes": [
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"descriptions": [
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"name": "https://github.com/aio-libs/aiohttp/security/advisories/GHSA-3wq7-rqq7-wx6j",
"tags": [
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"url": "https://github.com/aio-libs/aiohttp/security/advisories/GHSA-3wq7-rqq7-wx6j"
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"url": "https://github.com/aio-libs/aiohttp/commit/cbb774f38330563422ca0c413a71021d7b944145"
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"name": "https://github.com/aio-libs/aiohttp/releases/tag/v3.13.4",
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"source": {
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"discovery": "UNKNOWN"
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"title": "AIOHTTP: Late size enforcement for non-file multipart fields causes memory DoS"
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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