CVE-2024-27306

MEDIUM
Published Apr 18, 2024 Modified Nov 3, 2025 CWE-79 CWE-80

Description

aiohttp is an asynchronous HTTP client/server framework for asyncio and Python. A XSS vulnerability exists on index pages for static file handling. This vulnerability is fixed in 3.9.4. We have always recommended using a reverse proxy server (e.g. nginx) for serving static files. Users following the recommendation are unaffected. Other users can disable `show_index` if unable to upgrade.

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CVSS v3.1 Score

6.1
MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Weakness Type (CWE)

CWE-79 Cross-site Scripting (XSS)
CWE-80 CWE-80

Affected Products

Vendor Product
aiohttp aiohttp
fedoraproject fedora
fedoraproject fedora
fedoraproject fedora

References

Other References

https://github.com/aio-libs/aiohttp/pull/8319 https://lists.fedoraproject.org/archives/list/[email protected]/message/2EXRGTN2WG7VZLUZ7WOXU5GQJKCPPHKP/ https://lists.fedoraproject.org/archives/list/[email protected]/message/NWEI6NIHZ3G7DURDZVMRK7ZEFC2BTD3U/ https://lists.fedoraproject.org/archives/list/[email protected]/message/ZIVBMPEY7WWOFMC3CWXFBRQPFECV4SW3/ https://github.com/aio-libs/aiohttp/pull/8319 https://lists.debian.org/debian-lts-announce/2025/02/msg00002.html https://lists.fedoraproject.org/archives/list/[email protected]/message/2EXRGTN2WG7VZLUZ7WOXU5GQJKCPPHKP/ https://lists.fedoraproject.org/archives/list/[email protected]/message/NWEI6NIHZ3G7DURDZVMRK7ZEFC2BTD3U/ https://lists.fedoraproject.org/archives/list/[email protected]/message/ZIVBMPEY7WWOFMC3CWXFBRQPFECV4SW3/

Frequently Asked Questions

What is CVE-2024-27306? +
aiohttp is an asynchronous HTTP client/server framework for asyncio and Python. A XSS vulnerability exists on index pages for static file handling. This vulnerability is fixed in 3.9.4. We have always recommended using a reverse proxy server (e.g. nginx) for serving static files. Users following the recommendation are unaffected. Other users can disable `show_index` if unable to upgrade. It has a CVSS v3.1 base score of 6.1 (MEDIUM).
How severe is CVE-2024-27306? +
CVE-2024-27306 has a CVSS v3.1 score of 6.1 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.
What products are affected by CVE-2024-27306? +
CVE-2024-27306 affects products from aiohttp, fedoraproject, specifically: aiohttp, fedora. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2024-27306? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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