CVE-2026-34519

ADVISORY - github

Summary

An attacker who controls the reason parameter when creating a Response may be able to inject extra headers or similar exploits.

Impact

In the unlikely situation that an application allows untrusted data to be used in the response's reason parameter, then an attacker could manipulate the response to send something different from what the developer intended.

Patch: https://github.com/aio-libs/aiohttp/commit/53b35a2f8869c37a133e60bf1a82a1c01642ba2b

EPSS Score⁠: 0.00045 (0.138)

Common Weakness Enumeration (CWE)

ADVISORY - nist

CWE-113⁠

Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')

ADVISORY - github

CWE-113⁠

Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')

ADVISORY - redhat

CWE-1286⁠

Improper Validation of Syntactic Correctness of Input

Impacted images

Advisories

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