What is CVE-2019-9746?

CVE-2019-9746 is a high-severity vulnerability in Webmproject Libwebm, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2019-03-13.

How severe is CVE-2019-9746?

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

Is CVE-2019-9746 known to be exploited?

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

NULL pointer dereference in Webmproject Libwebm

CVE-2019-9746

In libwebm before 2019-03-08, a NULL pointer dereference caused by the functions OutputCluster and OutputTracks in webm_info.cc will trigger an abort, which allows a DoS attack, a similar issue to CVE-2018-19212.

Published 2019-03-13 · last modified 2026-06-17.

CVSS v3 metric

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

EPSS exploit prediction

EPSS: 0.016 (75.5th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 75th percentile — 75.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.016 · newest: 0.016 · change: 0.000

Affected products

Webmproject Libwebm

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

Public proof-of-concept exploits

References

bugs.chromium.org/p/webm/issues/detail (Permissions Required, Third Party Advisory)
chromium.googlesource.com/webm/libwebm/+/2427abe0bde234987ed005a3adca461e9a85df… (Patch, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2019-9746?: CVE-2019-9746 is a high-severity vulnerability in Webmproject Libwebm, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2019-03-13.
How severe is CVE-2019-9746?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2019-9746 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.