CVE-2023-30798

MultipartParser DOS with too many fields or files in Starlette Framework

HIGH
7.5
CVSS Score
Published: April 21, 2023 at 03:27 PM UTC
Updated: July 15, 2026 at 02:17 AM UTC
1 product affected across 1 vendorStarlette

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Severity
HIGH7.5
Exploit prediction
EPSS 1%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 0.25.0
Affected range stops below 0.25.0, so it looks safe — our inference, not a vendor statement

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHVulnCheck
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-400

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