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Fencer Vulns
medium 4.7

CVE-2023-6601 json

Ffmpeg: hls unsafe file extension bypass in ffmpeg

published 2025-01-06 22 mo ago modified 2026-07-18 3 mo ago also EUVD-2023-58824 , JLSEC-2025-146

cvss
4.7
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 36%
public exploits
0
none known

Summary

A flaw was found in FFmpeg's HLS demuxer. This vulnerability allows bypassing unsafe file extension checks and triggering arbitrary demuxers via base64-encoded data URIs appended with specific file extensions.

Patch / fix

  • julia FFMPEG_jll 6.1.1+0
  • julia FFplay_jll 7.1.0+0
  • ffmpeg ffmpeg 4.3.9, 4.4.6, 5.1.7, 6.1.3, 7.0.3, 7.1.1
  • ffmpeg Debian 14, Debian 13 7:6.1-1

debian advisories DEBIAN-CVE-2023-6601

  • ffmpeg-4 SLE Workstation Extension 15 SP7, SLE Module for Package Hub 15 SP7 4.4.7-150600.13.47.1
  • ffmpeg-4 SLES for SAP 15 SP4, SLES 15 SP4-LTSS, SLE High Performance Computing 15 SP4-LTSS +1 more 4.4.7-150400.3.67.1
  • ffmpeg-4 SLES for SAP 15 SP4, SLES 15 SP4-LTSS, SLE High Performance Computing 15 SP4-LTSS +1 more 4.4.6-150400.3.60.1
  • ffmpeg-4 SLE Workstation Extension 15 SP7, SLE Module for Package Hub 15 SP7, openSUSE Leap 15.6 4.4.6-150600.13.38.1

suse advisories SUSE-SU-2026:2445-1SUSE-SU-2026:2444-1SUSE-SU-2026:0229-1SUSE-SU-2026:0198-1

  • ffmpeg-7 openSUSE Leap 16.0 7.1.4-160000.1.1
  • ffmpeg-4 openSUSE Tumbleweed 4.4.6-10.1
  • ffmpeg-7 openSUSE Tumbleweed 7.1.3-1.1

opensuse advisories openSUSE-SU-2026:21211-1openSUSE-SU-2026:10027-1openSUSE-SU-2026:10028-1

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-2023-6601 updated cvss 4.7

ffmpeg: HLS Unsafe File Extension Bypass in FFmpeg

  • 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

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
22 mo ago

Exploit prediction

0.42% chance of exploitation in the next 30 days, higher than 36% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=2253172 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 4.7 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N
CISA ADP 3.1 4.7 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N
OSV 3.1 4.7 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N

Affected packages

ecosystem package affected fixed in
julia FFMPEG_jll
<6.1.1+0
6.1.1+0
julia FFplay_jll
<7.1.0+0
7.1.0+0

Classification

Weakness
  • CWE-99 Improper Control of Resource Identifiers
  • CWE-94 Improper Control of Generation of Code

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.

CPEs and fixed versions use Anchore's correction of NVD's data: Add affected version ranges.