Is CVE-2024-52303 in the CISA KEV catalog?

No. CVE-2024-52303 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2024-52303?

CVE-2024-52303 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2024-52303?

CVE-2024-52303 has an EPSS score of 0.56% (43th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2024-52303?

Upgrade python-aiohttp on debian 13 to 3.10.11-1 or later.

CVE & CISA-KEV Catalog

CVE-2024-52303

HIGH

7.5

CVSS v3

NVD

Description

aiohttp is an asynchronous HTTP client/server framework for asyncio and Python. In versions starting with 3.10.6 and prior to 3.10.11, a memory leak can occur when a request produces a MatchInfoError. This was caused by adding an entry to a cache on each request, due to the building of each MatchInfoError producing a unique cache entry. An attacker may be able to exhaust the memory resources of a server by sending a substantial number (100,000s to millions) of such requests. Those who use any middlewares with aiohttp.web should upgrade to version 3.10.11 to receive a patch.

CWE-772

How to fix

Remediation Available

python-aiohttpDebian

Fixed in:3.10.11-1CVE-2024-52303

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

0.56%probability of exploitation in 30 days

43rdpercentile

Moderate risk: more likely to be exploited than 43% of all known CVEs.

References

Patch1

github.com

Vendor Advisory1

github.com

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-08-15.