What is CVE-2023-5520?

CVE-2023-5520 is a high-severity vulnerability in Gpac, classified under Out-of-bounds Read. CVSS score: 7.7/10. Published 2023-10-11.

How severe is CVE-2023-5520?

High severity. CVSS v3 base score is 7.7 out of 10.

Out-of-bounds Read in Gpac

CVE-2023-5520

Out-of-bounds Read in GitHub repository gpac/gpac prior to 2.2.2.

Vulnerability class: Buffer Overflow

Published 2023-10-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.

EPSS exploit prediction

EPSS: 0.003 (23.1th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 23rd percentile — 23.1% 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: 0.003 · change: 0.000

Affected products

Gpac
Gpac Gpac/gpac — versions unspecified

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

huntr.dev/bounties/681e42d0-18d4-4ebc-aba0-c5b0f77ac74a (Exploit, Patch, Third Party Advisory)
github.com/gpac/gpac/commit/5692dc729491805e0e5f55c21d50ba1e6b19e88e (Patch)

Frequently asked questions

What is CVE-2023-5520?: CVE-2023-5520 is a high-severity vulnerability in Gpac, classified under Out-of-bounds Read. CVSS score: 7.7/10. Published 2023-10-11.
How severe is CVE-2023-5520?: High severity. CVSS v3 base score is 7.7 out of 10.