CVE-2026-4185Public exploit

Process crash via unchecked SWF output path

Published Mar 15, 2026 · Updated Mar 15, 2026

Stack-based buffer overflow in GPAC MP4Box 2.5-DEV-rev2167-gcc9d617c0-master allows local users to crash MP4Box during SWF import. In swf_def_bits_jpeg, sprintf appends an attacker-controlled localPath to an output filename without checking the 1,024-byte szName stack buffer. Exploitation requires command-line import of a crafted SWF from an overlong local path, and the demonstrated result is an AddressSanitizer-detected process abort.

CVSS severity6.3
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in GPAC MP4Box 2.5-DEV-rev2167-gcc9d617c0-master allows local users to crash MP4Box during SWF import. In swf_def_bits_jpeg, sprintf appends an attacker-controlled localPath to an output filename without checking the 1,024-byte szName stack buffer. Exploitation requires command-line import of a crafted SWF from an overlong local path, and the demonstrated result is an AddressSanitizer-detected process abort.

The record

CVE
CVE-2026-4185
Published
Mar 15, 2026
Updated
Mar 15, 2026
Vendor
GPAC Project
Product
GPAC
Classifications
CWE-121, CWE-119
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Mar 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=2.5-DEV-rev2167-gcc9d617c0-master

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

GPAC Project · GPACversion=2.5-DEV-rev2167-gcc9d617c0-master

Published CVSS scores

6.5VulDBAV:N/AC:L/Au:S/C:P/I:P/A:P
6.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
2.1VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer

Public exploit references

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Technologies

Your stack

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Your stack

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