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Vulnerability record · CVE-2023-30798 · published 21 April 2023

CVE-2023-30798: Encode starlette uncontrolled resource consumption vulnerability

Encode · Starlette

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.

7.5 CVSS 3.1 High EPSS 1.3% · top 30.7% CWE-400 · Uncontrolled resource consumption
7.5CVSS 3.1 base score
1.3%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References
15 Jul 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/encode/starlette/commit/8c74c2c8dba7030154f8af18e016136bea1938fa Patch
https://github.com/encode/starlette/security/advisories/GHSA-74m5-2c7w-9w3x MitigationVendor Advisory
https://vulncheck.com/advisories/starlette-multipartparser-dos PatchThird Party Advisory
https://github.com/encode/starlette/commit/8c74c2c8dba7030154f8af18e016136bea1938fa Patch
https://github.com/encode/starlette/security/advisories/GHSA-74m5-2c7w-9w3x MitigationVendor Advisory
https://vulncheck.com/advisories/starlette-multipartparser-dos PatchThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

6.5CVE-2026-48710Starlette Host header validation flaw enables request.url path mismatchStarlette before 1.0.1 did not validate the HTTP Host header before using it to rebuild request.url, so a malformed Host value could make request.url…KEVEPSS 7.1%analysed7.5CVE-2026-54283Encode starlette allocation without limits vulnerabilityStarlette is a lightweight ASGI framework/toolkit. From 0.4.1 until 1.3.1, request.form() accepts max_fields and max_part_size to bound resource cons…EPSS 0.48%7.5CVE-2026-48818Encode starlette server-side request forgery (ssrf) vulnerabilityStarlette is a lightweight ASGI framework/toolkit. In versions 1.0.1 and earlier, StaticFiles on Windows is vulnerable to SSRF. An UNC path such as \…EPSS 0.65%7.5CVE-2023-29159Encode starlette path traversal vulnerabilityDirectory traversal vulnerability in Starlette versions 0.13.5 and later and prior to 0.27.0 allows a remote unauthenticated attacker to view files i…EPSS 2.0%5.3CVE-2026-54282Encode starlette vulnerabilityStarlette is a lightweight ASGI framework/toolkit. Prior to 1.3.0, the HTTP request path is not validated before being used to reconstruct request.ur…EPSS 0.27%5.3CVE-2026-48817Encode starlette vulnerabilityStarlette is a lightweight ASGI framework/toolkit. In versions 1.0.1 and below, when dispatching a request, HTTPEndpoint selects the handler by lower…EPSS 0.35%7.5CVE-2026-28318SolarWinds Serv-U unauthenticated POST request denial of serviceSolarWinds Serv-U crashes when it receives a specially crafted POST request using Content-Encoding: deflate, and the crash occurs without authenticat…KEVEPSS 1.9%analysed7.5CVE-2026-45498Microsoft Defender antimalware platform uncontrolled resource consumption DoSCVE-2026-45498 is a denial of service flaw in the Microsoft Defender antimalware platform, classified as uncontrolled resource consumption (CWE-400).…KEVEPSS 1.3%analysed

Source: NIST National Vulnerability Database (record CVE-2023-30798), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.