What is CVE-2023-0866?

CVE-2023-0866 is a high-severity vulnerability in Gpac, classified under Heap-based Buffer Overflow. CVSS score: 7.8/10. Published 2023-02-16.

How severe is CVE-2023-0866?

High severity. CVSS v3 base score is 7.8 out of 10.

Is CVE-2023-0866 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Gpac

CVE-2023-0866

Heap-based Buffer Overflow in GitHub repository gpac/gpac prior to 2.3.0-DEV.

Vulnerability class: Buffer Overflow

Published 2023-02-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (37.0th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 37.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Gpac
Gpac Gpac/gpac — versions unspecified

Weakness classification (CWE)

CWE-122 — Heap-based Buffer Overflow

Public proof-of-concept exploits

References

huntr.dev/bounties/7d3c5792-d20b-4cb6-9c6d-bb14f3430d7f (Exploit, Patch, Third Party Advisory)
github.com/gpac/gpac/commit/b964fe4226f1424cf676d5822ef898b6b01f5937 (Patch)
www.debian.org/security/2023/dsa-5411 (vendor-advisory)

Frequently asked questions

What is CVE-2023-0866?: CVE-2023-0866 is a high-severity vulnerability in Gpac, classified under Heap-based Buffer Overflow. CVSS score: 7.8/10. Published 2023-02-16.
How severe is CVE-2023-0866?: High severity. CVSS v3 base score is 7.8 out of 10.
Is CVE-2023-0866 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.