Buffer overflow in Gpac
CVE-2026-91088
A vulnerability has been found in GPAC up to f1219cde. This issue affects the function gf_url_concatenate_ex of the file utils/url.c of the component URL Handler. The manipulation leads to heap-based buffer overflow. An attack has to be approached locally. Upgrading to version abi-16.23 is capable of addressing this issue. The identifier of the patch is afca1f1181668d85941d51ed1adf647807d5d975. It is advisable to upgrade the affected component.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.002 (5.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 5th percentile — 5.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Gpac — versions f1219cde
Weakness classification (CWE)
References
- github.com/gpac/gpac/ (product)
- github.com/gpac/gpac/commit/afca1f1181668d85941d51ed1adf647807d5d975 (patch)
- github.com/gpac/gpac/issues/3808 (issue-tracking)
- github.com/gpac/gpac/releases/tag/abi-16.23 (patch)
- vuldb.com/cve/CVE-2026-91088 (third-party-advisory)
- vuldb.com/submit/919757 (third-party-advisory)
- vuldb.com/vuln/403650 (technical-description, vdb-entry)
- vuldb.com/vuln/403650/cti (signature, permissions-required)
Frequently asked questions
- What is CVE-2026-91088?
- CVE-2026-91088 is a medium-severity vulnerability in Gpac, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 4.8/10. Published 2026-09-15.
- How severe is CVE-2026-91088?
- Medium severity. CVSS v3 base score is 4.8 out of 10.