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TI-2023-14608 Aliases CVE-2023-30798GHSA-74m5-2c7w-9w3x

MultipartParser DOS with too many fields or files in Starlette Framework

Priority MEDIUM 41CWE-400Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-400.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01299 70th percentileScored 2026-11-07
Fix Fixed Starlette (Encode): 0.25.0starlette (PyPI): 0.25.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
encodeStarlettebefore 0.25.00.25.0Patch availableCNA
—starlette (PyPI)before 0.25.00.25.0Patch availableGHSA-74m5-2c7w-9w3x
  • Starlette Vendorencode Affected before 0.25.0 Fixed in 0.25.0 Patch available CNA
  • starlette (PyPI) Vendor— Affected before 0.25.0 Fixed in 0.25.0 Patch available GHSA-74m5-2c7w-9w3x

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:encode:starlette:*:*:*:*:*:python:*:*before 0.25.0Vulnerableencode
  • cpe:2.3:a:encode:starlette:*:*:*:*:*:python:*:* Versions before 0.25.0 Vulnerable ·encode

Remediation

  • Fix · CNA Starlette (Encode) Fixed in 0.25.0
  • Fix · GHSA-74m5-2c7w-9w3x starlette (PyPI) Fixed in 0.25.0 Advisory →

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-30798
  2. 2026-10-03 Alias added: GHSA-74m5-2c7w-9w3x

References

Patch 1

Advisory 2

Other 2

  • TI-2026-35991 Starlette has missing Host header validation that poisons request.url.path, bypassing path-based security checks KEVCVSS 3.1MEDIUM 6.5
  • TI-2023-13590 Path traversal in encode Starlette CVSS 3.1HIGH 7.5
  • TI-2026-39183 Starlette: request.form() limits silently ignored for application/x-www-form-urlencoded enable DoS CVSS 3.1HIGH 7.5
  • TI-2026-36087 Starlette: SSRF and NTLM credential theft via UNC paths in StaticFiles on Windows CVSS 3.1HIGH 7.5
  • TI-2026-36086 Starlette: Arbitrary HTTP method dispatched to `HTTPEndpoint` attributes via `getattr` CVSS 3.1MEDIUM 5.3
  • TI-2026-39182 Starlette: Unvalidated request path concatenated into authority poisons request.url.hostname CVSS 3.1MEDIUM 5.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences