DEBIAN-CVE-2025-62727

Advisory lineage Upstream: 1 Downstream: 0
Upstream
CVE-2025-62727
Published: 28 Oct 2025, 21:15
Last modified:15 Jun 2026, 19:05

Vulnerability Summary

Overall Risk (default)
medium
30/100
CVSS Score
7.5 HIGH
3.1 (osv_debian)
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

28 Oct 2025, 21:15
Published
Vulnerability first disclosed
15 Jun 2026, 19:05
Last Modified
Vulnerability information updated

Description

Starlette is a lightweight ASGI framework/toolkit. Starting in version 0.39.0 and prior to version 0.49.1 , an unauthenticated attacker can send a crafted HTTP Range header that triggers quadratic-time processing in Starlette's FileResponse Range parsing/merging logic. This enables CPU exhaustion per request, causing denial‑of‑service for endpoints serving files (e.g., StaticFiles or any use of FileResponse). This vulnerability is fixed in 0.49.1.

CVSS Metrics

  • v3.1•HIGH•Score: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Systems

  • debian•starlette

    all | all | all | < 0.46.1-3+deb13u1 | < 0.50.0-1

References (1)