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CVE-2026-50269

LOW
2.7
CVSS 4.0
Description
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.0, attacker-controlled input included into multipart/payload headers can be used to modify a request to inject additional headers or similar. In the unlikely situation that an application is passing user-controlled strings into MultipartWriter.append(headers=...) or Payload.headers, then an attacker may be able to modify the request to inject headers or change the contents of the request. This vulnerability is fixed in 3.14.0.

Metadata

CVE ID
CVE-2026-50269
State
PUBLISHED
Assigner
GitHub_M
Reserved
2026-06-04 16:26 UTC
Published
2026-06-22 16:30 UTC
Last updated
2026-06-22 17:22 UTC
Primary CWE
CWE-93
CWE-93: Improper Neutralization of CRLF Sequences ('CRLF Inj…
Vendor / Product
aio-libs / aiohttp
Sources
cve.org  ·  NVD

Severity & Metrics

2.7 LOW CVSS 4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U
SSVC — CISA Coordinator
Exploitation
none
Automatable
yes
Tech. Impact
partial
Affected products (1)
VendorProductPlatformVersions
aio-libs aiohttp — < 3.14.0
Weakness (CWE)
CWESourceDescription
CWE-113 cna CWE-113: Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')
CWE-93 cna CWE-93: Improper Neutralization of CRLF Sequences ('CRLF Injection')
CVSS scores (1)
ScoreSeverityVersionSourceVector
2.7 LOW 4.0 cna CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U
References (2)
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