What is CVE-2018-6758?

CVE-2018-6758 is a critical-severity vulnerability in Unbit Uwsgi, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2018-02-06.

How severe is CVE-2018-6758?

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

Buffer overflow in Unbit Uwsgi

CVE-2018-6758

The uwsgi_expand_path function in core/utils.c in Unbit uWSGI through 2.0.15 has a stack-based buffer overflow via a large directory length.

Vulnerability class: Buffer Overflow

Published 2018-02-06 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.020 (80.5th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 80th percentile — 80.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.020 · newest: 0.020 · change: 0.000

Affected products

Unbit Uwsgi

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

lists.debian.org/debian-lts-announce/2018/02/msg00010.html (mailing-list, Third Party Advisory)
lists.unbit.it/pipermail/uwsgi/2018-February/008835.html (Patch, Issue Tracking)
github.com/unbit/uwsgi/commit/cb4636f7c0af2e97a4eef7a3cdcbd85a71247bfe (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2018-6758?: CVE-2018-6758 is a critical-severity vulnerability in Unbit Uwsgi, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2018-02-06.
How severe is CVE-2018-6758?: Critical severity. CVSS v3 base score is 9.8 out of 10.