FFmpeg before 8.1.3 contains a protection mechanism failure in the HLS demuxer that allows attackers to bypass protocol and allowed_extensions restrictions when opening child playlists. Attackers can supply a crafted master playlist whose child playlists use disallowed protocols or non-multimedia local files, making parse_playlist() open resources the HLS security policy should block.
CVE-2026-107697
MEDIUMPre-NVD 4.34.3—Trending — 4 sources updated this week
EchelonGraph scoreHIGH confidence
Score 4.3 from GitHub Security Advisory published 2026-10-08. A secondary CVSS source baseline 4.3; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: ghsa, secondary
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 4.3Exploit: None knownExposed services: Not assessed
An upstream fix is merged but not yet released — mitigate (WAF / firewall / segmentation) until the release ships, then apply it.
- CVSS v3
- 4.3
- EG Score
- 4.3MEDIUMhigh confidence
- EG Risk
- 24EG Risk 24/100CISA SSVC
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity43% × 45%Exploitation0% × 40%Automatability30% × 15%CISA SSVC: Track at low or medium mission impact; Track or Attend at high (mission-essential systems).Action: An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high until it ships, then apply the release. - EPSS PROB
- 0.3%
- EPSS %ILE
- 23rd
- KEV
- Not listed
CISA SSVCTrack at low or medium mission impact; Track or Attend at high (mission-essential systems).
An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high until it ships, then apply the release.
Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table
Published
October 8, 2026
Last Modified
October 8, 2026
Advisory Details (6)
Auto-updated Oct 8, 2026Upstream fix merged — awaiting tagged release. Sources: github_commit.
generic
FFmpeg before 8.1.3 HLS Demuxer Security Check Bypass via parse_playlist() | Advisories | VulnCheck
https://www.vulncheck.com/advisories/ffmpeg-before-8.1.3-hls-demuxer-security-check-bypass-via-parse-playlistgithub_commit
commit 23602df9cd1b (FFmpeg/FFmpeg)
Fix landed in FFmpeg/FFmpeg commit 23602df9cd1b — awaiting tagged release
https://github.com/FFmpeg/FFmpeg/commit/23602df9cd1b485c45ba6f533d3b85569de3f323github_commit
commit 191715f0232c (FFmpeg/FFmpeg)
Fix landed in FFmpeg/FFmpeg commit 191715f0232c — awaiting tagged release
https://github.com/FFmpeg/FFmpeg/commit/191715f0232cgithub_commit
commit 01044d04536e (FFmpeg/FFmpeg)
Fix landed in FFmpeg/FFmpeg commit 01044d04536e — awaiting tagged release
https://github.com/FFmpeg/FFmpeg/commit/01044d04536egeneric
FFmpeg/libavformat/hls.c at n8.1.2 · FFmpeg/FFmpeg · GitHub
https://github.com/FFmpeg/FFmpeg/blob/n8.1.2/libavformat/hls.c#L834generic
GitHub - FFmpeg/FFmpeg: Mirror of https://git.ffmpeg.org/ffmpeg.git · GitHub
https://github.com/FFmpeg/FFmpegVendor Advisories for CVE-2026-107697(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 7× in last 7d / 7× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-10-09 20:06 UTCEPSS rescore
- 2026-10-09 19:52 UTCGHSA enrichment
- 2026-10-08 21:16 UTCGHSA enrichment
- 2026-10-08 18:36 UTCEG score recompute
- 2026-10-08 18:36 UTCGHSA enrichment
- 2026-10-08 17:47 UTCEG score recompute
- 2026-10-08 17:44 UTCMITRE cvelistV5first tracked
Related CVEs(same CWE)
Frequently asked(5)
What is CVE-2026-107697?
CVE-2026-107697 is a medium vulnerability published on October 8, 2026. FFmpeg before 8.1.3 contains a protection mechanism failure in the HLS demuxer that allows attackers to bypass protocol and allowedextensions restrictions when opening child playlists. Attackers can supply a crafted master playlist whose child playlists use disallowed protocols or non-multimedia…
When was CVE-2026-107697 disclosed?
CVE-2026-107697 was first published on October 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-107697 actively exploited?
CVE-2026-107697 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (23rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-107697?
CVE-2026-107697 has a CVSS base score of 4.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-107697?
An upstream fix for CVE-2026-107697 has been merged but is not yet in a tagged release. Until it ships, restrict network exposure of the affected system or apply the vendor's mitigation, then update to the release that contains the fix. The vendor advisories EchelonGraph has for CVE-2026-107697 are linked in the Vendor Advisories panel on this page.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-107697
Is Your Infrastructure Affected by CVE-2026-107697?
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