What is CVE-2023-4756?

CVE-2023-4756 is a medium-severity vulnerability in Gpac, classified under Stack-based Buffer Overflow. CVSS score: 5.5/10. Published 2023-09-04.

How severe is CVE-2023-4756?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Buffer overflow in Gpac

CVE-2023-4756

Stack-based Buffer Overflow in GitHub repository gpac/gpac prior to 2.3-DEV.

Vulnerability class: Buffer Overflow

Published 2023-09-04 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.003 (21.2th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 21st percentile — 21.2% 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: 0.003 · change: +0.000

Affected products

Gpac
Gpac Gpac/gpac — versions unspecified

Weakness classification (CWE)

References

huntr.dev/bounties/2342da0e-f097-4ce7-bfdc-3ec0ba446e05 (Exploit, Patch, Third Party Advisory, Issue Tracking)
github.com/gpac/gpac/commit/6914d016e2b540bac2c471c4aea156ddef8e8e01 (Patch)

Frequently asked questions

What is CVE-2023-4756?: CVE-2023-4756 is a medium-severity vulnerability in Gpac, classified under Stack-based Buffer Overflow. CVSS score: 5.5/10. Published 2023-09-04.
How severe is CVE-2023-4756?: Medium severity. CVSS v3 base score is 5.5 out of 10.