CVE-2026-75146

highpriority · track · 0EPSS 0.003 · 18 %ileDE
grimoire priorityP2 · Scheduled
Exploitable?
—
no known exploitation
Likely / severe?
0.26% (18th) EPSS
CVSS 8.1 · high
Is it mine?
5 products
Check your exposure
Who says so?
1 sources
cert_bund

EPSS · scored 2026-10-27

FFmpeg before commit 65b0dab contains an out-of-bounds read in the DASH demuxer (libavformat/dashdec.c). When a live DASH manifest is refreshed with a startNumber that is lower than the previous value, the current sequence number is driven negative. The fragment retrieval function checked only the upper bound before indexing the fragments array, allowing a negative index to be used and causing an out-of-bounds read. A malicious or misconfigured DASH server can trigger this by serving a live manifest with a decreasing startNumber across a manifest refresh.

01

cvss

Technical severity, 0–10. One row per scoring source.

8.1
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5.1–8.1

v3.18.1highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:Hsecondary · disclosure@vulncheck.comexploitability 2.8 · impact 5.2
v4.07.2highCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Xsecondary · disclosure@vulncheck.com
v4.05.1mediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Xsecondary · CVSS-BT (t0sche)
02

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS
03

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-125US
04

affected products (5)

Products and version ranges known to be affected.

05

advisories (1)

Vendor and ecosystem advisories describing this.

  • WID-SEC-W-2026-2939ffmpeg: Mehrere SchwachstellenDeutsch2026-08-19csaf · cert_bundDE

    Ein Angreifer kann mehrere Schwachstellen in ffmpeg ausnutzen, um einen nicht näher spezifizierten Angriff durchzuführen, um beliebigen Programmcode auszuführen, und um einen Denial of Service Angriff durchzuführen.

06

sources

Which sources assert this record, and when.

cert_bundNVDCVE.orgMITRE
published 2026-08-19modified 2026-10-26
07

references (3) nvd

External citations — patches, advisories, analysis.

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