What is CVE-2016-9969?

CVE-2016-9969 is a high-severity vulnerability in Webmproject Libwebp, classified under Double Free. CVSS score: 7.5/10. Published 2019-05-23.

How severe is CVE-2016-9969?

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

Double Free in Webmproject Libwebp

CVE-2016-9969

In libwebp 0.5.1, there is a double free bug in libwebpmux.

Vulnerability class: Double Free

Published 2019-05-23 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.014 (71.6th percentile), scored 2026-09-28.

Low probability of exploitation in the next 30 days, but still tracked. 72nd percentile — 71.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000

Affected products

Webmproject Libwebp — versions 0.5.1

Weakness classification (CWE)

CWE-415 — Double Free

References

bugs.chromium.org/p/webp/issues/detail (Exploit, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2016-9969?: CVE-2016-9969 is a high-severity vulnerability in Webmproject Libwebp, classified under Double Free. CVSS score: 7.5/10. Published 2019-05-23.
How severe is CVE-2016-9969?: High severity. CVSS v3 base score is 7.5 out of 10.