---
title: "CVE-2026-92399: GPAC - Buffer Overflow"
description: "GPAC 26.07.0 contains a heap-based buffer overflow caused by manipulation of the payload_size argument in the WebSocket Handler component, letting remote attackers execute arbitrary code, exploit requires crafted payload."
url: https://panop.io/threat-heartbeat/CVE-2026-92399/
---

# CVE-2026-92399 GPAC - Buffer Overflow

GPAC 26.07.0 contains a heap-based buffer overflow caused by manipulation of the payload\_size argument in the WebSocket Handler component, letting remote attackers execute arbitrary code, exploit requires crafted payload.

CVSS base score 7.3 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.69% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-92399)

## Details

Type

Buffer Overflow

Impact

Remote Code Execution

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Published

16 September 2026

Updated

15 October 2026

Weakness

[CWE-119](https://cwe.mitre.org/data/definitions/119.html)

## Vendor fix

Upgrade to version abi-16.26.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-92399](https://nvd.nist.gov/vuln/detail/CVE-2026-92399)
- [https://vuldb.com/vuln/405551/cti](https://vuldb.com/vuln/405551/cti)
- [https://github.com/gpac/gpac/issues/3860](https://github.com/gpac/gpac/issues/3860)
- [https://github.com/gpac/gpac/releases/tag/abi-16.26](https://github.com/gpac/gpac/releases/tag/abi-16.26)
- [https://github.com/user-attachments/files/31208030/poc\_rmt\_ws\_malicious\_frame.py](https://github.com/user-attachments/files/31208030/poc_rmt_ws_malicious_frame.py)
- [https://vuldb.com/cve/CVE-2026-92399](https://vuldb.com/cve/CVE-2026-92399)
- [https://vuldb.com/submit/940250](https://vuldb.com/submit/940250)
- [https://github.com/gpac/gpac/](https://github.com/gpac/gpac/)
- [https://github.com/gpac/gpac/commit/37bccbb30cf53a0e1a084cea9a1ce422b3ddfe12](https://github.com/gpac/gpac/commit/37bccbb30cf53a0e1a084cea9a1ce422b3ddfe12)
- [https://vuldb.com/vuln/405551](https://vuldb.com/vuln/405551)

[← All CVEs](https://panop.io/threat-heartbeat/)

## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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