Buffer overflow in Gpac
CVE-2026-91091
A vulnerability was identified in GPAC up to f1219cde. The impacted element is the function gf_node_list_insert_child of the file scenegraph/base_scenegraph.c of the component Node Insertion. Such manipulation leads to memory corruption. The attack can be launched remotely. The exploit is publicly available and might be used. Upgrading to version abi-16.23 is sufficient to resolve this issue. The name of the patch is 49dee5cad329cfed310c1682703df7daa47df31a. It is suggested to upgrade the affected component.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.007 (52.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 52.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
- Gpac — versions f1219cde
Weakness classification (CWE)
References
- vuldb.com/vuln/403653 (technical-description, vdb-entry)
- vuldb.com/vuln/403653/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-91091 (third-party-advisory)
- vuldb.com/submit/919761 (third-party-advisory)
- github.com/gpac/gpac/issues/3811 (issue-tracking)
- github.com/user-attachments/files/30400179/poc_18_nstatx.zip (exploit)
- github.com/gpac/gpac/commit/49dee5cad329cfed310c1682703df7daa47df31a (patch)
- github.com/gpac/gpac/releases/tag/abi-16.23 (patch)
- github.com/gpac/gpac/ (product)
Frequently asked questions
- What is CVE-2026-91091?
- CVE-2026-91091 is a medium-severity vulnerability in Gpac, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 4.3/10. Published 2026-09-15.
- How severe is CVE-2026-91091?
- Medium severity. CVSS v3 base score is 4.3 out of 10.