What is CVE-2023-41419?

CVE-2023-41419 is a critical-severity vulnerability in Gevent. CVSS score: 9.8/10. Published 2023-09-25.

How severe is CVE-2023-41419?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2023-41419 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Gevent

CVE-2023-41419

An issue in Gevent before version 23.9.0 allows a remote attacker to escalate privileges via a crafted script to the WSGIServer component.

Published 2023-09-25 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.018 (77.6th percentile), scored 2026-10-05.

Low probability of exploitation in the next 30 days, but still tracked. 78th percentile — 77.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.013 · newest: 0.018 · change: +0.004

Affected products

Gevent

Public proof-of-concept exploits

aywengo/httpbin-k8s-deployment

References

github.com/gevent/gevent/issues/1989 (Exploit, Third Party Advisory, Issue Tracking)
github.com/gevent/gevent/commit/2f53c851eaf926767fbac62385615efd4886221c (Patch)
af854a3a-2127-422b-91ae-364da2661108

Frequently asked questions

What is CVE-2023-41419?: CVE-2023-41419 is a critical-severity vulnerability in Gevent. CVSS score: 9.8/10. Published 2023-09-25.
How severe is CVE-2023-41419?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2023-41419 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.