Dashboard / CVE-2026-120246

CVE-2026-120246

MEDIUM
MEDIUM Priority: 0.01 BB Relevance: 39/100
Published: 2026-11-01 Modified: 2026-11-05 First seen: 2026-11-01 Status: active

Attack Surface

Low Complexity No Auth Conf. Impact

CVSS Vector Breakdown

AV: Local
AC: Low
PR: None
UI: Passive
S: X
AT: None
VC: High
VI: None
VA: None

Description

FFmpeg 4.4 through 9.0.2 contains a use of uninitialized variable vulnerability in the CDXL decoder that leaks stack memory into decoded pixels via unfilled HAM palette entries. Attackers can craft a type-0 CDXL file whose HAM pixels select unfilled new_palette entries in cdxl_decode_ham8() or cdxl_decode_ham6(), exposing stack bytes and pointer fragments in the BGR24 output.

Weakness Classification (1)

Affected Software (2)

VendorProductVersion
FFmpeg FFmpeg 4.4
FFmpeg FFmpeg 4.4

References & Advisories (5)

Bug Bounty Relevance

39 / 100
✓ No authentication
✓ Low complexity

CVSS Score

6.8 / 10.0 v4.0
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/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:X

EPSS — Exploitation Probability

0.12%
Raw Score 0.001240
Percentile 2.2%
Date 2026-11-13

EPSS Trend

2026-11-13
0.00124
2026-11-12
0.00124
2026-11-10
0.00124
2026-11-09
0.00124
2026-11-08
0.00124
2026-11-07
0.00124
2026-11-06
0.00124
2026-11-05
0.00124
2026-11-04
0.00124
2026-11-03
0.00124
2026-11-02
0.00124
2026-11-01
0.00124

Intelligence Sources

mitre ref →
nvd ref →

External Links