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CVE-2023-49082

17
FAUCET Score

CVE-2023-49082 affects aiohttp, an asynchronous HTTP client/server framework for Python, due to improper validation of HTTP methods and versions. An attacker controlling the HTTP method can inject new headers or create new HTTP requests, while controlling the HTTP version allows for request smuggling. This vulnerability has a CVSS score of 5.3 (Medium), indicating a low attack complexity and no user interaction required, with a potential impact of modifying requests. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 3.9.0CPE matchmatch criteria
cpe:2.3:a:aiohttp:aiohttp:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.3MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.95%
Probability of exploitation in next 30 days
EPSS Percentile
57.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0095 is in the 36th percentile among its peer group of 23,725 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (6)

pippatch availablevia ghsa
Product: aiohttpFixed in: 3.9.0
redhatpatch availablevia redhat_api
Product: Red Hat Ansible Automation Platform 2.4 for RHEL 8Fixed in: python3x-aiohttp-0:3.9.1-1.el8ap
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Ansible Automation Platform 2.4 for RHEL 9Fixed in: python-aiohttp-0:3.9.1-1.el9ap
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Satellite 6.15 for RHEL 8Fixed in: python-aiohttp-0:3.9.2-1.el8pc
View patch
redhatpatch availablevia redhat_api
Product: RHUI 4 for RHEL 8Fixed in: python-aiohttp-0:3.9.2-1.el8ui
View patch
github_advisoryvendor investigatingvia nvd_reference
View patch

Vendor Advisories (2)

redhatCVE-2023-49082Low

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

Nov 29, 2023
pipGHSA-qvrw-v9rv-5rjxmedium

aiohttp's ClientSession is vulnerable to CRLF injection via method

Nov 27, 2023

References

lists.debian.org / debian-lts-announce/2025/02/msg00002.html
lists.fedoraproject.org / archives/list/[email protected]/message/WSYWMP64ZFCTC3VO6RY6EC6VSSMV6I3A
gist.github.com / jnovikov/7f411ae9fe6a9a7804cf162a3bdbb44b
ExploitThird Party Advisory
github.com / aio-libs/aiohttp/commit/e4ae01c2077d2cfa116aa82e4ff6866857f7c466
github.com / aio-libs/aiohttp/pull/7806/files
github.com / aio-libs/aiohttp/security/advisories/GHSA-qvrw-v9rv-5rjx
ExploitVendor Advisory