CVE-2026-107695

FFmpeg before 8.1.3 HLS Demuxer Infinite Loop via Self-Referencing Playlist

MEDIUM
6.5
CVSS Score
Published: October 8, 2026 at 05:30 PM UTC
Updated: October 14, 2026 at 11:54 PM UTC
1 product affected across 1 vendorFFMPEG

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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.5%
SSVC
PoC

Description

FFmpeg before 8.1.3 contains an infinite loop vulnerability in the HLS demuxer that allows remote attackers to cause denial of service because parse_playlist() accepts Master Playlist tags inside Media Playlists. Attackers can trick victims into opening a crafted self-referencing playlist that endlessly adds variants in hls_read_header(), causing unbounded CPU and I/O consumption.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 8.1.3

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUMVulnCheck
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-835

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