CVE-2026-91091

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreHIGH confidence

Score 4.3 from GitHub Security Advisory (severity: LOW) published 2026-09-15. a secondary CVSS source baseline 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 4.3Exploit: Elevated riskExposed: 0

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

A vulnerability was identified in GPAC up to f1219cde. The impacted element is the function gf_node_list_insert_child of the file scenegraph/base_scenegraph.c of the component Node Insertion. Such manipulation leads to memory corruption. The attack can be launched remotely. The exploit is publicly available and might be used. Upgrading to version abi-16.23 is sufficient to resolve this issue. The name of the patch is 49dee5cad329cfed310c1682703df7daa47df31a. It is suggested to upgrade the affected component.

CVSS v3
4.3
EG Score
4.3(high)
EG Risk
35(Track)
EG Risk 35/100SSVC: 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
Severity43% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
51%
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 49dee5cad329 (gpac/gpac)

Fix landed in gpac/gpac commit 49dee5cad329 — awaiting tagged release

https://github.com/gpac/gpac/commit/49dee5cad329cfed310c1682703df7daa47df31a
generic
https://github.com/user-attachments/files/30400179/poc_18_nstatx.zip
generic

SEGV in `gf_node_list_insert_child` during `-nstatx` scene-command apply · Issue #3811 · gpac/gpac · GitHub

https://github.com/gpac/gpac/issues/3811

Vendor Advisories for CVE-2026-91091(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 18× in last 7d / 36× 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. 2026-09-24 18:10 UTCEG score recompute
  2. 2026-09-24 18:10 UTCGHSA enrichment
  3. 2026-09-24 14:04 UTCEPSS rescore
  4. 2026-09-23 17:54 UTCEPSS rescore
  5. 2026-09-23 17:30 UTCGHSA enrichment
  6. 2026-09-22 17:11 UTCEG score recompute
  7. 2026-09-22 17:11 UTCGHSA enrichment
  8. 2026-09-22 16:01 UTCEPSS rescore
  9. 2026-09-21 21:09 UTCEPSS rescore
  10. 2026-09-21 16:59 UTCEG score recompute
  11. 2026-09-21 16:59 UTCGHSA enrichment
  12. 2026-09-20 20:16 UTCEPSS rescore
  13. 2026-09-20 16:29 UTCGHSA enrichment
  14. 2026-09-19 16:19 UTCEG score recompute
  15. 2026-09-19 16:19 UTCGHSA enrichment
  16. 2026-09-18 19:28 UTCEPSS rescore
  17. 2026-09-18 16:08 UTCEG score recompute
  18. 2026-09-18 16:08 UTCGHSA enrichment
  19. 2026-09-17 19:32 UTCEPSS rescore
  20. 2026-09-17 15:53 UTCGHSA enrichment
  21. 2026-09-16 15:42 UTCEG score recompute
  22. 2026-09-16 15:42 UTCGHSA enrichment
  23. 2026-09-16 14:09 UTCEPSS rescore
  24. 2026-09-16 05:15 UTCEPSS rescore
  25. 2026-09-15 15:31 UTCEG score recompute
Show 11 more
  1. 2026-09-15 15:31 UTCGHSA enrichment
  2. 2026-09-15 14:52 UTCEG score recompute
  3. 2026-09-15 14:52 UTCGHSA enrichment
  4. 2026-09-15 14:51 UTCNVD updateCVSS v4 → 2.1
  5. 2026-09-15 14:33 UTCEG score recompute
  6. 2026-09-15 14:33 UTCGHSA enrichment
  7. 2026-09-15 14:32 UTCMITRE cvelistV5CVSS v4 → 5.3
  8. 2026-09-15 08:26 UTCEG score recompute
  9. 2026-09-15 08:25 UTCNVD updateCVSS v4 → 2.1
  10. 2026-09-15 07:53 UTCEG score recompute
  11. 2026-09-15 07:52 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-91091?
CVE-2026-91091 is a medium vulnerability published on September 15, 2026. A vulnerability was identified in GPAC up to f1219cde. The impacted element is the function gfnodelistinsertchild of the file scenegraph/base_scenegraph.c of the component Node Insertion. Such manipulation leads to memory corruption. The attack can be launched remotely. The exploit is publicly…
When was CVE-2026-91091 disclosed?
CVE-2026-91091 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-2026-91091 actively exploited?
CVE-2026-91091 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 49.4% of all scored CVEs.
What is the CVSS score of CVE-2026-91091?
CVE-2026-91091 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2026-91091?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-91091, 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

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