CVE-2026-92399

HIGHPre-NVD 7.37.3—
EchelonGraph scoreHIGH confidence

Score 7.3 from GitHub Security Advisory published 2026-09-16. a secondary CVSS source baseline 7.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 5 sources updated this weekElevated
7.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.3Exploit: Elevated riskExposed: 0

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

A vulnerability was determined in GPAC 26.07.0. This affects the function rmt_client_handle_ws_frame of the file src/utils/rmt_ws.c of the component WebSocket Handler. Executing a manipulation of the argument payload_size can lead to heap-based buffer overflow. It is possible to launch the attack remotely. The exploit has been publicly disclosed and may be utilized. Upgrading to version abi-16.26 is able to mitigate this issue. This patch is called 37bccbb30cf53a0e1a084cea9a1ce422b3ddfe12. Upgrading the affected component is recommended.

CVSS v3
7.3
EG Score
7.3(high)
EG Risk
64(Attend)
EG Risk 64/100SSVC: Attend

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
Severity73% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
1%
EPSS %ILE
50%
KEV
Not listed

Published

September 16, 2026

Last Modified

September 18, 2026

Advisory Details (4)

Auto-updated Sep 16, 2026
🔬 Proof of concept available. 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 37bccbb30cf5 (gpac/gpac)

Fix landed in gpac/gpac commit 37bccbb30cf5 — awaiting tagged release

https://github.com/gpac/gpac/commit/37bccbb30cf53a0e1a084cea9a1ce422b3ddfe12
generic
https://github.com/user-attachments/files/31208030/poc_rmt_ws_malicious_frame.py
generic🟡 PoC Available

[Security] Heap Buffer Overflow in rmt_client_handle_ws_frame (rmt_ws.c) via crafted WebSocket frame · Issue #3860 · gpac/gpac · GitHub

https://github.com/gpac/gpac/issues/3860

Vendor Advisories for CVE-2026-92399(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 23× in last 7d / 23× 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 03:40 UTCGHSA enrichment
  2. 2026-09-19 16:37 UTCEG score recompute
  3. 2026-09-19 16:37 UTCGHSA enrichment
  4. 2026-09-19 05:34 UTCEG score recompute
  5. 2026-09-19 05:34 UTCGHSA enrichment
  6. 2026-09-18 19:28 UTCEPSS rescore
  7. 2026-09-18 18:32 UTCEG score recompute
  8. 2026-09-18 18:32 UTCGHSA enrichment
  9. 2026-09-18 18:26 UTCNVD updateCVSS v4 → 5.5
  10. 2026-09-18 18:15 UTCEG score recompute
  11. 2026-09-18 18:15 UTCGHSA enrichment
  12. 2026-09-18 18:14 UTCMITRE cvelistV5CVSS v4 → 6.9
  13. 2026-09-18 14:15 UTCGHSA enrichment
  14. 2026-09-18 03:12 UTCEG score recompute
  15. 2026-09-18 03:12 UTCGHSA enrichment
  16. 2026-09-17 19:32 UTCEPSS rescore
  17. 2026-09-17 16:09 UTCGHSA enrichment
  18. 2026-09-17 05:06 UTCEG score recompute
  19. 2026-09-17 05:06 UTCGHSA enrichment
  20. 2026-09-16 17:36 UTCEG score recompute
  21. 2026-09-16 17:21 UTCNVD updateCVSS v4 → 5.5
  22. 2026-09-16 16:22 UTCEG score recompute
  23. 2026-09-16 16:19 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-92399?
CVE-2026-92399 is a high vulnerability published on September 16, 2026. A vulnerability was determined in GPAC 26.07.0. This affects the function rmtclienthandlewsframe of the file src/utils/rmtws.c of the component WebSocket Handler. Executing a manipulation of the argument payloadsize can lead to heap-based buffer overflow. It is possible to launch the attack…
When was CVE-2026-92399 disclosed?
CVE-2026-92399 was first published in the National Vulnerability Database on September 16, 2026, with the most recent update on September 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-92399 actively exploited?
CVE-2026-92399 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 49.8% of all scored CVEs.
What is the CVSS score of CVE-2026-92399?
CVE-2026-92399 has a CVSS v3 base score of 7.3 (NVD).
How do I remediate CVE-2026-92399?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-92399, 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-2026-92399

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