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GPAC MP4Box EUVDEUVD-2026-77205

| CVE-2026-90686 MEDIUM
Buffer Overflow (CWE-119)
2026-09-14 VulDB GHSA-qwm3-v6mj-w6g3
Buffer Overflow Gpac N A
5.5
CVSS 4.0 · Vendor: VulDB
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Severity by source

Vendor (VulDB) PRIMARY
5.5 MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vuln.today AI
4.3 MEDIUM

File must be actively processed by MP4Box (UI:R); impact is crash only (A:L), no confidentiality or integrity effect confirmed.

3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
4.0 AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Primary rating from Vendor (VulDB).

CVSS VectorVendor: VulDB

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

4
CVSS changed
Sep 14, 2026 - 06:22 NVD
6.9 (MEDIUM) 5.5 (MEDIUM)
Source Code Evidence Fetched
Sep 14, 2026 - 06:07 vuln.today
Analysis Generated
Sep 14, 2026 - 06:07 vuln.today
CVE Published
Sep 14, 2026 - 05:30 cve.org
MEDIUM 6.9

DescriptionCVE.org

A vulnerability was found in GPAC up to f1219cde. This affects the function gf_bt_report of the file scene_manager/loader_bt.c of the component MP4Box. The manipulation results in memory corruption. The attack may be performed from remote. The exploit has been made public and could be used. Upgrading to version abi-16.23 is able to mitigate this issue. The patch is identified as afca1f1181668d85941d51ed1adf647807d5d975. It is suggested to upgrade the affected component.

AnalysisAI

Memory corruption in GPAC's BIFS Text (BT) scene parser allows a remote attacker to crash the MP4Box process or corrupt process memory by supplying a crafted BT scene file. The primary defect in gf_bt_parse_bifs_command() (loader_bt.c:2812) is a format-string mismatch: the variable str is embedded in the format literal passed to gf_bt_report rather than supplied as a variadic argument, causing the %s specifier to dereference an uncontrolled stack or heap value. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

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Vulnerability AssessmentAI

Exploitation The attacker must supply a crafted BIFS Text (BT) scene file that triggers an unknown BIFS command syntax, causing `gf_bt_parse_bifs_command()` to reach the `gf_bt_report` error path at loader_bt.c:2812. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The vendor-supplied CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:N/UI:N/VA:L/E:P) produces a 6.9 score, representing a network-reachable availability impact with no confidentiality or integrity effects - consistent with a process crash rather than code execution. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Upgrade GPAC to release abi-16.23 or apply patch commit afca1f1181668d85941d51ed1adf647807d5d975 directly from the upstream repository at https://github.com/gpac/gpac. … Detailed patch versions, workarounds, and compensating controls in full report.
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EUVD-2026-77205 vulnerability details – vuln.today
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