CVE-2023-30798

Name: CVE-2023-30798
Creator: NVD / NIST
Published: 2023-04-21T16:15:07.51+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.29%

Last modified Jun 17, 2026

CVE-2023-30798 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. There MultipartParser usage in Encode's Starlette python framework before versions 0.25.0 allows an unauthenticated and remote attacker to specify any number of form fields or files which can cause excessive memory usage resulting in denial of service of the HTTP service.. EPSS estimates a 1.29% chance of exploitation in the next 30 days.

Description

There MultipartParser usage in Encode's Starlette python framework before versions 0.25.0 allows an unauthenticated and remote attacker to specify any number of form fields or files which can cause excessive memory usage resulting in denial of service of the HTTP service.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

1.29%

66.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Encode	Starlette	< 0.25.0

References

https://github.com/encode/starlette/commit/8c74c2c8dba7030154f8af18e016136bea1938faPatch
https://github.com/encode/starlette/security/advisories/GHSA-74m5-2c7w-9w3xMitigation, Vendor Advisory
https://vulncheck.com/advisories/starlette-multipartparser-dosPatch, Third Party Advisory
https://github.com/encode/starlette/commit/8c74c2c8dba7030154f8af18e016136bea1938faPatch
https://github.com/encode/starlette/security/advisories/GHSA-74m5-2c7w-9w3xMitigation, Vendor Advisory
https://vulncheck.com/advisories/starlette-multipartparser-dosPatch, Third Party Advisory

Timeline

Published: Apr 21, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-30798?

How severe is CVE-2023-30798?

CVE-2023-30798 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.29% probability of exploitation in the next 30 days.

How do I fix CVE-2023-30798?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-30798?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST