Chainguard: multiple eco-python-ffmpeg-8-minimal packages, multiple ffmpeg-8.1 packages: security update to 8.1.3-r0

high Tenable Self-Hosted Container Security Plugin ID 476532

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

- FFmpeg through 8.1.2, fixed in commit 8670835, contains an information disclosure vulnerability in the
LCL/ZLIB video decoder that allows attackers to expose uninitialized heap memory by supplying a valid zlib
stream that inflates to fewer bytes than the expected frame size. The zlib_decomp() function in lcldec.c
treats short decompression as non-fatal and continues to the RGB24 conversion path, which copies a full
frame's worth of rows from the allocation buffer using original frame dimensions, causing uninitialized
heap contents including pointer-derived allocator bytes to be copied into the attacker-observable AVFrame
output and potentially defeating ASLR in long-lived media processing services. (CVE-2026-66038)

Solution

Update the eco-python-ffmpeg-8-minimal library and its related packages to version 8.1.3-r0 or later.

Plugin Details

Severity: High

ID: 476532

Version: Revision 1.2

Type: Local

Family: Chainguard Local Security Checks

Published: 10/21/2026

Updated: 10/22/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.72

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:N/A:N

CVSS Score Source: CVE-2026-66038

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: High

Base Score: 7.1

Threat Score: 4.9

Threat Vector: CVSS:4.0/E:U

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

Vulnerability Information

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 7/24/2026

Reference Information

CVE: CVE-2026-66038

Detections

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