Buffer overflow in Gpac
CVE-2026-4185
A vulnerability was found in GPAC up to 2.5-DEV-rev2167-gcc9d617c0-master. This vulnerability affects 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 results in stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been made public and could be used. The patch is identified as 8961c74f87ae3fe2d3352e622f7730ca96d50cf1. A patch should be applied to remediate this issue.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.004 (35.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 35th percentile — 35.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.002
Affected products
- Gpac — versions 2.5-DEV-rev2167-gcc9d617c0-master
Weakness classification (CWE)
References
- vuldb.com/ (technical-description, vdb-entry)
- vuldb.com/ (signature, permissions-required)
- vuldb.com/ (third-party-advisory)
- github.com/gpac/gpac/issues/3436 (issue-tracking)
- github.com/PeterXukt/test_pocs/blob/main/gpac/test.swf (exploit)
- github.com/gpac/gpac/commit/8961c74f87ae3fe2d3352e622f7730ca96d50cf1 (patch)
- github.com/gpac/gpac/ (product)
Frequently asked questions
- What is CVE-2026-4185?
- CVE-2026-4185 is a medium-severity vulnerability in Gpac, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 6.3/10. Published 2026-03-16.
- How severe is CVE-2026-4185?
- Medium severity. CVSS v3 base score is 6.3 out of 10.