CVE-2026-91086

MEDIUMPre-NVD 6.36.3—
EchelonGraph scoreHIGH confidence

Score 6.3 from GitHub Security Advisory (severity: LOW) published 2026-09-15. a secondary CVSS source baseline 6.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 5 sources updated this weekElevated
6.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.3Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

A security vulnerability has been detected in GPAC up to f1219cde. Affected by this issue is the function mpgviddmx_process of the file filters/reframe_mpgvid.c of the component MPEG Video Reframer. Such manipulation leads to heap-based buffer overflow. The attack can be executed remotely. The exploit has been disclosed publicly and may be used. Upgrading to version abi-16.23 can resolve this issue. The name of the patch is afca1f1181668d85941d51ed1adf647807d5d975. Upgrading the affected component is recommended.

CVSS v3
6.3
EG Score
6.3(high)
EG Risk
44(Track)
EG Risk 44/100SSVC: Track

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 computed
Severity63% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
26%
KEV
Not listed

Published

September 15, 2026

Last Modified

September 15, 2026

Advisory Details (4)

Auto-updated Sep 15, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit.
generic

GitHub - gpac/gpac: GPAC Ultramedia OSS for Video Streaming & Next-Gen Multimedia Transcoding, Packaging & Delivery · GitHub

https://github.com/gpac/gpac/
github_commit

commit afca1f118166 (gpac/gpac)

Fix landed in gpac/gpac commit afca1f118166 — awaiting tagged release

https://github.com/gpac/gpac/commit/afca1f1181668d85941d51ed1adf647807d5d975
generic
https://github.com/user-attachments/files/30399291/poc_10_add.zip
generic

heap-buffer-overflow in `mpgviddmx_process` during MPEG video import · Issue #3806 · gpac/gpac · GitHub

https://github.com/gpac/gpac/issues/3806

Vendor Advisories for CVE-2026-91086(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 24× in last 7d / 24× 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.

  1. 2026-09-20 11:20 UTCEG score recompute
  2. 2026-09-20 11:20 UTCGHSA enrichment
  3. 2026-09-19 12:11 UTCEG score recompute
  4. 2026-09-19 12:10 UTCGHSA enrichment
  5. 2026-09-18 19:28 UTCEPSS rescore
  6. 2026-09-18 13:01 UTCEG score recompute
  7. 2026-09-18 13:01 UTCGHSA enrichment
  8. 2026-09-17 19:32 UTCEPSS rescore
  9. 2026-09-17 13:52 UTCGHSA enrichment
  10. 2026-09-16 14:41 UTCEG score recompute
  11. 2026-09-16 14:41 UTCGHSA enrichment
  12. 2026-09-16 14:09 UTCEPSS rescore
  13. 2026-09-16 05:15 UTCEPSS rescore
  14. 2026-09-15 15:31 UTCGHSA enrichment
  15. 2026-09-15 14:52 UTCEG score recompute
  16. 2026-09-15 14:52 UTCGHSA enrichment
  17. 2026-09-15 14:51 UTCNVD updateCVSS v4 → 2.1
  18. 2026-09-15 14:18 UTCEG score recompute
  19. 2026-09-15 14:18 UTCGHSA enrichment
  20. 2026-09-15 14:18 UTCMITRE cvelistV5CVSS v4 → 5.3
  21. 2026-09-15 07:32 UTCEG score recompute
  22. 2026-09-15 07:30 UTCNVD updateCVSS v4 → 2.1
  23. 2026-09-15 06:39 UTCEG score recompute
  24. 2026-09-15 06:38 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-91086?
CVE-2026-91086 is a medium vulnerability published on September 15, 2026. A security vulnerability has been detected in GPAC up to f1219cde. Affected by this issue is the function mpgviddmxprocess of the file filters/reframempgvid.c of the component MPEG Video Reframer. Such manipulation leads to heap-based buffer overflow. The attack can be executed remotely. The…
When was CVE-2026-91086 disclosed?
CVE-2026-91086 was first published in the National Vulnerability Database on September 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-91086 actively exploited?
CVE-2026-91086 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 74.4% of all scored CVEs.
What is the CVSS score of CVE-2026-91086?
CVE-2026-91086 has a CVSS v3 base score of 6.3 (NVD).
How do I remediate CVE-2026-91086?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-91086, 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-2026-91086

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