Medium
AIOHTTP: Absolute-form request targets can spoof Request.scheme
Type: advisorySources: OSV
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.4, an attacker can send an absolute-form request that causes Request.scheme to use attacker-controlled request-target scheme data instead of the connection protocol. Applications that use Request.scheme for security decisions can consequently be tricked into treating an unencrypted connection as encrypted or an encrypted connection as unencrypted. This issue is fixed in version 3.14.4.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-111748
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 2 Nov 2026, 18:16 UTC · Revision 1
Source evidence
AIOHTTP: Absolute-form request targets can spoof Request.scheme
core-osv · Original sourcePublished 19 Oct 2026, 17:02 UTC
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.4, an attacker can send an absolute-form request that causes Request.scheme to use attacker-controlled request-target scheme data instead of the connection protocol. Applications that use Request.scheme for security decisions can consequently be tricked into treating an unencrypted connection as encrypted or an encrypted connection as unencrypted. This issue is fixed in version 3.14.4.
osv:CVE-2026-111748
Complete source record
{
"id": "4130be1fdbbb103627b636ef6e6825cf71ade94836fef73061ec512744d0c756",
"url": "https://osv.dev/vulnerability/CVE-2026-111748",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "AIOHTTP: Absolute-form request targets can spoof Request.scheme",
"summary": "AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.4, an attacker can send an absolute-form request that causes Request.scheme to use attacker-controlled request-target scheme data instead of the connection protocol. Applications that use Request.scheme for security decisions can consequently be tricked into treating an unencrypted connection as encrypted or an encrypted connection as unencrypted. This issue is fixed in version 3.14.4.",
"evidence": "osv:CVE-2026-111748",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2026-111748",
"aliases": [
"CVE-2026-111748",
"GHSA-f9xw-jh8m-3mwq"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/aio-libs/aiohttp",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "c72c7eaaa1337e4ceb611b13e382d6ccb54e4ecb"
},
{
"fixed": "6d4e7b01f9b951aa084a75d7356e907d4ee80411"
}
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"database_specific": {
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{
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{
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"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"range": [
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],
"source": "REFERENCES_COMMIT"
},
{
"range": [
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"source": "REFERENCES_TAG",
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],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-111748.json"
}
}
],
"modified": "2026-10-28T02:30:21.802820680Z",
"provider": "osv",
"references": [
"https://github.com/aio-libs/aiohttp/releases/tag/v3.14.4",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/111xxx/CVE-2026-111748.json",
"https://github.com/aio-libs/aiohttp/security/advisories/GHSA-f9xw-jh8m-3mwq",
"https://nvd.nist.gov/vuln/detail/CVE-2026-111748",
"https://github.com/aio-libs/aiohttp/commit/6d4e7b01f9b951aa084a75d7356e907d4ee80411"
],
"provider_metadata": {
"cwe_ids": [
"CWE-807"
],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/111xxx/CVE-2026-111748.json"
}
},
"related_cves": [
{
"value": "CVE-2026-111748",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 488253,
"published_at": "2026-10-19T17:02:21.289+00:00"
}