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MEDIUM

CVE-2023-49082

CVSS v3

5.3

MEDIUM

EPSS Score

0.9 %

exploit probability, as of 2026-10-19

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • aiohttpPyPIall versions · fixed in 3.9.0

Vendor advisories

  • CVE-2023-49082 Red Hat Product Security34 products fixed · 1 known affected

    aiohttp: CRLF injection if user controls the HTTP method using aiohttp client

    aiohttp.src as a component of Red Hat Ansible Automation Platform 1.2

  • RHSA-2024:2010 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: Satellite 6.15.0 release

  • RHSA-2024:1878 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: RHUI 4.8 Release - Security Updates, Bug Fixes, and Enhancements

  • RHSA-2024:1057 Red Hat Product Security26 products fixed

    Red Hat Security Advisory: Red Hat Ansible Automation Platform 2.4 Product Security and Bug Fix Update

Full record on NVD

Description

aiohttp is an asynchronous HTTP client/server framework for asyncio and Python. Improper validation makes it possible for an attacker to modify the HTTP request (e.g. insert a new header) or even create a new HTTP request if the attacker controls the HTTP method. The vulnerability occurs only if the attacker can control the HTTP method (GET, POST etc.) of the request. If the attacker can control the HTTP version of the request it will be able to modify the request (request smuggling). This issue has been patched in version 3.9.0.

Technical details

Published
2023-11-29

Frequently asked questions

What is CVE-2023-49082?

aiohttp is an asynchronous HTTP client/server framework for asyncio and Python. Improper validation makes it possible for an attacker to modify the HTTP request (e.g. insert a new header) or even create a new HTTP request if the attacker controls the HTTP method. The vulnerability occurs only if the attacker can control the HTTP method (GET, POST etc.) of the request. If the attacker can control the HTTP version of the request it will be able to modify the request (request smuggling). This issue has been patched in version 3.9.0.

Is CVE-2023-49082 actively exploited?

Active exploitation of CVE-2023-49082 has not been confirmed. Its EPSS score was 0.9% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-49082?

CVE-2023-49082 has a CVSS v3 base score of 5.3 (MEDIUM severity).

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