CVE-2023-30798

MultipartParser DOS with too many fields or files in Starlette Framework

At a glance

Severity: HIGH 7.5
EPSS: EPSS 1.30 % · percentile 70 (2026-10-27)
State: PUBLISHED
Published: 2023-04-21
Updated: 2026-07-15
Assigner: VulnCheck
NVD status: Modified

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.

Scores

Version	Score	Vector	Scored by
CVSS 3.1	HIGH 7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	VulnCheck
CVSS 3.1	HIGH 7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	NVD · disclosure@vulncheck.com (Secondary)
CVSS 3.1	HIGH 7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	NVD · nvd@nist.gov (Primary)

Weaknesses (CWE)

CWE-400

Advisories

GHSA-74m5-2c7w-9w3x — MultipartParser denial of service with too many fields or files
PYSEC-2023-48 — 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

European references

ENISA EUVD · EUVD-2023-0244
GCVE · GCVE-0-2023-30798

Affected configurations (NVD CPE)

cpe:2.3:a:encode:starlette:*:*:*:*:*:python:*:* < 0.25.0

Affected products

Product	Versions
Encode · Starlette	affected 0 < 0.25.0

References

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD