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CVE-2026-34519

AIOHTTP: HTTP response splitting via \r in reason phrase PUBLISHED

Description (CNA)

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, an attacker who controls the reason parameter when creating a Response may be able to inject extra headers or similar exploits. This issue has been patched in version 3.13.4.

Affected (CNA)

Vendor / productVersions
aio-libs / aiohttpaffected < 3.13.4

CWE

CWE-113

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.