A NULL pointer dereference in the AP4_TkhdAtom::GetTrackId() function of Aleksoid1978 MPC-BE before commit 4341cb3 allows attackers to cause a Denial of Service (DoS) via a crafted MP4 file.
CVE-2026-36909
MEDIUMPre-NVD 6.26.2—Trending — 4 sources updated this week
EchelonGraph scoreHIGH confidence
Score 6.2 from GitHub Security Advisory published 2026-07-02. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 6.2; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
6.2
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.2Exploit: NoneExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 6.2
- EG Score
- 6.2(high)
- EPSS
- 2.2%
- KEV
- Not listed
Published
July 1, 2026
Last Modified
July 2, 2026
Advisory Details (2)
Auto-updated Jul 4, 2026No patch confirmed yet.
generic
SEGV ASAN in mp4decrypt · Issue #965 · axiomatic-systems/Bento4 · GitHub
https://github.com/axiomatic-systems/Bento4/issues/965generic
We would like to report some critical issues from Bento4 · Issue #1062 · Aleksoid1978/MPC-BE · GitHub
https://github.com/Aleksoid1978/MPC-BE/issues/1062Vendor Advisories for CVE-2026-36909(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 12× in last 7d / 12× 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.
- 2026-07-06 19:00 UTCEG score recompute
- 2026-07-06 18:59 UTCGHSA enrichment
- 2026-07-06 16:27 UTCEPSS rescore
- 2026-07-06 16:27 UTCEPSS rescore
- 2026-07-05 19:34 UTCEG score recompute
- 2026-07-05 19:34 UTCGHSA enrichment
- 2026-07-04 20:09 UTCEG score recompute▲ 6.20
- 2026-07-04 20:09 UTCGHSA enrichment
- 2026-07-04 06:31 UTCEPSS rescore
- 2026-07-02 16:58 UTCNVD updateCVSS v3 → 6.2 · severity → MEDIUM
- 2026-07-01 23:10 UTCEG score recompute
- 2026-07-01 23:08 UTCNVD updatefirst tracked
Frequently asked(5)
What is CVE-2026-36909?
CVE-2026-36909 is a medium vulnerability published on July 1, 2026. A NULL pointer dereference in the AP4_TkhdAtom::GetTrackId() function of Aleksoid1978 MPC-BE before commit 4341cb3 allows attackers to cause a Denial of Service (DoS) via a crafted MP4 file.
When was CVE-2026-36909 disclosed?
CVE-2026-36909 was first published in the National Vulnerability Database on July 1, 2026, with the most recent update on July 2, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-36909 actively exploited?
CVE-2026-36909 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-36909?
CVE-2026-36909 has a CVSS v3.1 base score of 6.2 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-36909?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-36909, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-36909
Is Your Infrastructure Affected by CVE-2026-36909?
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