GPAC up to 2.5-DEV-rev2167-gcc9d617c0-master MP4Box swf_parse.c swf_def_bits_jpeg szName stack-based overflow
Summary
A vulnerability classified as critical has been found in GPAC up to 2.5-DEV-rev2167-gcc9d617c0-master. This issue affects the function swf_def_bits_jpeg of the file src/scene_manager/swf_parse.c of the component MP4Box. This manipulation of the argument szName causes stack-based overflow.
This vulnerability is handled as CVE-2026-4185. The attack can be initiated remotely. Additionally, an exploit exists.
To fix this issue, it is recommended to deploy a patch.
Details
A vulnerability classified as critical was found in GPAC up to 2.5-DEV-rev2167-gcc9d617c0-master. Affected by this vulnerability is the function swf_def_bits_jpeg of the file src/scene_manager/swf_parse.c of the component MP4Box. The manipulation of the argument szName with an unknown input leads to a stack-based overflow vulnerability. The CWE definition for the vulnerability is CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). As an impact it is known to affect confidentiality, integrity, and availability.
It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-4185. The exploitation appears to be easy. The attack can be launched remotely. Technical details and also a public exploit are known.
It is possible to download the exploit at github.com. It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 302538 (Linux Distros Unpatched Vulnerability : CVE-2026-4185), which helps to determine the existence of the flaw in a target environment.
Applying the patch 8961c74f87ae3fe2d3352e622f7730ca96d50cf1 is able to eliminate this problem. The bugfix is ready for download at github.com.
The vulnerability is also documented in the vulnerability database at Tenable (302538). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Product
Type
Name
Version
License
Website
- Product: https://github.com/gpac/gpac/
CPE 2.3
CPE 2.2
CVSSv4
VulDB Vector: 🔒VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 6.3VulDB Meta Temp Score: 5.7
VulDB Base Score: 6.3
VulDB Temp Score: 5.7
VulDB Vector: 🔒
VulDB Reliability: 🔍
CVSSv2
| AV | AC | Au | C | I | A |
|---|---|---|---|---|---|
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
|---|---|---|---|---|---|
| Unlock | Unlock | Unlock | Unlock | Unlock | Unlock |
| Unlock | Unlock | Unlock | Unlock | Unlock | Unlock |
| Unlock | Unlock | Unlock | Unlock | Unlock | Unlock |
VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍
Exploiting
Class: Stack-based overflowCWE: CWE-121 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒
Physical: No
Local: No
Remote: Yes
Availability: 🔒
Access: Public
Status: Proof-of-Concept
Programming Language: 🔒
Download: 🔒
EPSS Score: 🔒
EPSS Percentile: 🔒
Price Prediction: 🔍
Current Price Estimation: 🔒
| 0-Day | Unlock | Unlock | Unlock | Unlock |
|---|---|---|---|---|
| Today | Unlock | Unlock | Unlock | Unlock |
Nessus ID: 302538
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-4185
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: PatchStatus: 🔍
0-Day Time: 🔒
Patch: 8961c74f87ae3fe2d3352e622f7730ca96d50cf1
Timeline
03/14/2026 Advisory disclosed03/14/2026 VulDB entry created
03/18/2026 VulDB entry last update
Sources
Product: github.comAdvisory: 3436
Status: Confirmed
CVE: CVE-2026-4185 (🔒)
GCVE (CVE): GCVE-0-2026-4185
GCVE (VulDB): GCVE-100-351091
scip Labs: https://www.scip.ch/en/?labs.20161013
Entry
Created: 03/14/2026 23:06Updated: 03/18/2026 21:38
Changes: 03/14/2026 23:06 (61), 03/18/2026 21:38 (2)
Complete: 🔍
Submitter: peterx
Cache ID: 216::103
Submit
Accepted
- Submit #769840: gpac MP4Box MP4Box - GPAC version 2.5-DEV-rev2167-gcc9d617c0-master and earlier Stack-based Buffer Overflow (by peterx)
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
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