What is CVE-2026-48809?

CVE-2026-48809 is a high-severity vulnerability in Miguelgrinberg Python-engineio, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-08-11.

How severe is CVE-2026-48809?

High severity. CVSS v3 base score is 7.5 out of 10.

Resource exhaustion in Miguelgrinberg Python-engineio

CVE-2026-48809

python-engineio is a Python implementation of the Engine.IO realtime client and server. Versions prior to 4.13.2 have two specific configurations of the python-engineio server in which the size of incoming messages is not checked before th…

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Miguelgrinberg Python-engineio — versions < 4.13.2

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-48809?: CVE-2026-48809 is a high-severity vulnerability in Miguelgrinberg Python-engineio, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-08-11.
How severe is CVE-2026-48809?: High severity. CVSS v3 base score is 7.5 out of 10.