What is CVE-2023-46927?

CVE-2023-46927 is a medium-severity vulnerability in Gpac, classified under Out-of-bounds Write. CVSS score: 5.5/10. Published 2023-11-01.

How severe is CVE-2023-46927?

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

Is CVE-2023-46927 known to be exploited?

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

Buffer overflow in Gpac

CVE-2023-46927

GPAC 2.3-DEV-rev605-gfc9e29089-master contains a heap-buffer-overflow in gf_isom_use_compact_size gpac/src/isomedia/isom_write.c:3403:3 in gpac/MP4Box.

Vulnerability class: Buffer Overflow

Published 2023-11-01 · 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: 0.002 (9.6th percentile), scored 2026-10-05.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 10th percentile — 9.6% 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 2.3-dev-rev605-gfc9e29089-master

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

Public proof-of-concept exploits

raulvillalpando/BufferOverflow

References

github.com/gpac/gpac/issues/2657 (Vendor Advisory)
github.com/gpac/gpac/commit/a7b467b151d9b54badbc4dd71e7a366b7c391817 (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2023-46927?: CVE-2023-46927 is a medium-severity vulnerability in Gpac, classified under Out-of-bounds Write. CVSS score: 5.5/10. Published 2023-11-01.
How severe is CVE-2023-46927?: Medium severity. CVSS v3 base score is 5.5 out of 10.
Is CVE-2023-46927 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.