What is CVE-2020-26797?

CVE-2020-26797 is a high-severity vulnerability in Mediaarea Mediainfo, classified under Out-of-bounds Write. CVSS score: 7.5/10. Published 2021-03-18.

How severe is CVE-2020-26797?

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

Buffer overflow in Mediaarea Mediainfo

CVE-2020-26797

Mediainfo before version 20.08 has a heap buffer overflow vulnerability via MediaInfoLib::File_Gxf::ChooseParser_ChannelGrouping.

Vulnerability class: Buffer Overflow

Published 2021-03-18 · last modified 2026-06-17.

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.

EPSS exploit prediction

EPSS: 0.042 (90.7th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 91st percentile — 90.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.042 · newest: 0.042 · change: 0.000

Affected products

Mediaarea Mediainfo
Fedoraproject Fedora — versions 33

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

sourceforge.net/p/mediainfo/bugs/1154/ (Exploit, Patch, Third Party Advisory)
lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)

Frequently asked questions

What is CVE-2020-26797?: CVE-2020-26797 is a high-severity vulnerability in Mediaarea Mediainfo, classified under Out-of-bounds Write. CVSS score: 7.5/10. Published 2021-03-18.
How severe is CVE-2020-26797?: High severity. CVSS v3 base score is 7.5 out of 10.