Buffer overflow in Gpac
CVE-2026-91086
A security vulnerability has been detected in GPAC up to f1219cde. Affected by this issue is the function mpgviddmx_process of the file filters/reframe_mpgvid.c of the component MPEG Video Reframer. Such manipulation leads to heap-based buffer overflow. The attack can be executed remotely. The exploit has been disclosed publicly and may be used. Upgrading to version abi-16.23 can resolve this issue. The name of the patch is afca1f1181668d85941d51ed1adf647807d5d975. Upgrading the affected component is recommended.
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:N/UI:R/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.006 (46.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 46th percentile — 46.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
- Gpac — versions f1219cde
Weakness classification (CWE)
References
- vuldb.com/vuln/403647 (technical-description, vdb-entry)
- vuldb.com/vuln/403647/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-91086 (third-party-advisory)
- vuldb.com/submit/919755 (third-party-advisory)
- github.com/gpac/gpac/issues/3806 (issue-tracking)
- github.com/user-attachments/files/30399291/poc_10_add.zip (exploit)
- github.com/gpac/gpac/commit/afca1f1181668d85941d51ed1adf647807d5d975 (patch)
- github.com/gpac/gpac/releases/tag/abi-16.23 (patch)
- github.com/gpac/gpac/ (product)
Frequently asked questions
- What is CVE-2026-91086?
- CVE-2026-91086 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 2026-09-15.
- How severe is CVE-2026-91086?
- Medium severity. CVSS v3 base score is 6.3 out of 10.