This report was translated by AI; nobody has reviewed the translation yet. Original language: Slovak.

[TLP:CLEAR] FFmpeg fixes 4 vulnerabilities

FFmpeg versions 4.4.7, 5.1.9, 6.1.5, 7.1.4, 8.0.2, 8.1.1 and 9.0 fix 2 vulnerabilities [1][2]. In addition to the vulnerabilities described below, 2 low-severity vulnerabilities (CVE-2026-52296, CVE-2026-52297) were disclosed, the fix for which is only in version 9.0 [3][4].

FFmpeg - out-of-bounds read (CVE-2026-90815)
CVSS 5.3 (Medium)

An unauthenticated remote attacker can, by using the convolution filter functionality to process a specially crafted video, access data without authorization or possibly carry out a DoS attack [1]. A PoC and details are available at [5].

The vulnerability is present in product:

  • FFmpeg; >=4.4.0, <4.4.7; >=5.1.0, <5.1.9; >=6.1.0, <6.1.5; >7.1.0, <7.1.4; >=8.0.0, <8.0.2;

CVSS: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N

More information:

The vulnerability was publicly disclosed 14. 9. 2026.

FFmpeg - DoS (CVE-2026-90816)
CVSS 5.3 (Medium)

An unauthenticated remote attacker can carry out a DoS attack by choosing inappropriate values of the argument that sets the video segment length [2]. A PoC and details are available at [6].

The vulnerability is present in product:

  • FFmpeg; >=8.0.0, <8.0.1;

CVSS: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X

More information:

The vulnerability was publicly disclosed 14. 9. 2026.

By CESNET, z.s.p.o. Martin Krajči on 15. 9. 2026.

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