How severe is CVE-2024-30251?

CVE-2024-30251 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2024-30251 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-30251?

CVE-2024-30251 affects Aiohttp. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-30251?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2024-30251 have an EU (EUVD) identifier?

Yes. CVE-2024-30251 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-1442.

When was CVE-2024-30251 published?

CVE-2024-30251 was published on 2024-05-02 and last updated on 2026-06-17.

CVE-2024-30251

CVE-2024-30251 is a high-severity vulnerability in Aiohttp with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-835.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (61st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-1442
Weakness: CWE-835
Affected product: Aiohttp
Published: 2024-05-02
Last modified: 2026-06-17

Description

aiohttp is an asynchronous HTTP client/server framework for asyncio and Python. In affected versions an attacker can send a specially crafted POST (multipart/form-data) request. When the aiohttp server processes it, the server will enter an infinite loop and be unable to process any further requests. An attacker can stop the application from serving requests after sending a single request. This issue has been addressed in version 3.9.4. Users are advised to upgrade. Users unable to upgrade may manually apply a patch to their systems. Please see the linked GHSA for instructions.

Frequently asked questions

What is CVE-2024-30251?: aiohttp is an asynchronous HTTP client/server framework for asyncio and Python. In affected versions an attacker can send a specially crafted POST (multipart/form-data) request. When the aiohttp server processes it, the server will enter an infinite loop and be unable to process any further requests. An attacker can stop the application from serving requests after sending a single request. This issue has been addressed in version 3.9.4. Users are advised to upgrade. Users unable to upgrade may manually apply a patch to their systems. Please see the linked GHSA for instructions.
How severe is CVE-2024-30251?: CVE-2024-30251 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2024-30251 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-30251?: CVE-2024-30251 affects Aiohttp. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-30251?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2024-30251 have an EU (EUVD) identifier?: Yes. CVE-2024-30251 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-1442.
When was CVE-2024-30251 published?: CVE-2024-30251 was published on 2024-05-02 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:aiohttp:aiohttp:*:*:*:*:*:*:*:*

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