7.5

CVE-2023-30798: encode starlette Uncontrolled Resource Consumption

CVSS: 7.5v3.1HighModified
AliasesGHSA-74m5-2c7w-9w3xPYSEC-2023-48UBUNTU-CVE-2023-30798
Published 21-04-2023Last modified 15-07-2026
Open JSON

Vulnerability summary

CVE-2023-30798 is a high (CVSS 7.5) Uncontrolled Resource Consumption vulnerability in encode starlette. EPSS estimates a 1.30% chance of exploitation in the next 30 days, higher than 69.9% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
1.30%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 21-04-2023
    PublishedVulnerability first disclosed.
  2. 15-07-2026
    Last modifiedVulnerability information updated.

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 metrics

6 scores · 5 sources · 2 versions

EPSS trend

Probability

1.30%

Chance of exploitation in the next 30 days

Percentile

70%

Versus all other CVEs

30-day change

0.00 pp

From 1.30% on 19-09-2026

19-09-202619-10-2026
EPSS score
1.30%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • starlette< 0.25.0-1
Encode1 product
PyPI1 product
  • starlette< 8c74c2c8dba7030154f8af18e016136bea1938fa | < 0.25.0
Ubuntu1 product
  • starletteAll versions (No fix recorded)

4 vendors · 4 products

References

9 links