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Fencer Vulns
high 7.5

CVE-2020-26797 json

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

published 2021-03-18 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-19333

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.9%
EPSS 2.9% chance of exploitation in 30 days, percentile 86%
public exploits
0
none known

Summary

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

Patch / fix

  • mediaarea mediainfo 20.08
  • libmediainfo Debian 14, Debian 13, Debian 12 20.09+dfsg-2

debian advisories DEBIAN-CVE-2020-26797

  • libmediainfo Ubuntu Pro 14.04 LTS 0.7.67-2ubuntu1+esm2
  • libmediainfo Ubuntu Pro 16.04 LTS 0.7.82-1ubuntu0.1~esm2
  • libmediainfo Ubuntu Pro 18.04 LTS 17.12-1ubuntu0.1+esm1
  • libmediainfo Ubuntu Pro 20.04 LTS 19.09+dfsg-2ubuntu0.1~esm1

ubuntu advisories UBUNTU-CVE-2020-26797

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • libmediainfo Arch Linux 20.09-2

arch linux advisories AVG-1706

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-26797 updated cvss 5.5

mediainfo: heap-based buffer overflow via MediaInfoLib::File_Gxf::ChooseParser_ChannelGrouping

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.87% chance of exploitation in the next 30 days, higher than 86% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • sourceforge.net https://sourceforge.net/p/mediainfo/bugs/1154/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.