What is CVE-2026-5056?

CVE-2026-5056 is a high-severity vulnerability in Gstreamer, classified under Stack-based Buffer Overflow. CVSS score: 7.8/10. Published 2026-07-29.

How severe is CVE-2026-5056?

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

Buffer overflow in Gstreamer

CVE-2026-5056

GStreamer qtdemux Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of GStreamer. Interaction with this library is required to ex…

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Gstreamer — versions a303670510771b993867ddf62bff3bce0cb988c3

Weakness classification (CWE)

CWE-121 — Stack-based Buffer Overflow

References

zdi-disclosures@trendmicro.com (x_research-advisory)
zdi-disclosures@trendmicro.com (vendor-advisory)
af854a3a-2127-422b-91ae-364da2661108

Frequently asked questions

What is CVE-2026-5056?: CVE-2026-5056 is a high-severity vulnerability in Gstreamer, classified under Stack-based Buffer Overflow. CVSS score: 7.8/10. Published 2026-07-29.
How severe is CVE-2026-5056?: High severity. CVSS v3 base score is 7.8 out of 10.