What is CVE-2026-33813?

CVE-2026-33813 is a high-severity vulnerability in Golang Image, classified under CWE-190: INTEGER OVERFLOW OR WRAPAROUND. CVSS score: 7.5/10. Published 2026-04-21.

How severe is CVE-2026-33813?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Golang Image

CVE-2026-33813

Parsing a WEBP image with an invalid, large size panics on 32-bit platforms.

Published 2026-04-21 · last modified 2026-06-25.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.006 (47.6th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 47.6% 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: 0.006 · change: +0.003

Affected products

Golang Image
Golang.org/x/image Golang.org/x/image/webp — versions 0

References

go.dev/cl/759860 (Patch)
go.dev/issue/78407 (Issue Tracking)
pkg.go.dev/vuln/GO-2026-4961 (Vendor Advisory)
go.dev/cl/780860

Frequently asked questions

What is CVE-2026-33813?: CVE-2026-33813 is a high-severity vulnerability in Golang Image, classified under CWE-190: INTEGER OVERFLOW OR WRAPAROUND. CVSS score: 7.5/10. Published 2026-04-21.
How severe is CVE-2026-33813?: High severity. CVSS v3 base score is 7.5 out of 10.