Panic when decoding large WEBP image on 32-bit platforms in golang.org/x/image

HIGH 7.5CVE-2026-33813 · GO-2026-4961 · Published 21/04/2026 · updated 26/10/2026

In short

CVE-2026-33813 is a HIGH (CVSS 7.5) vulnerability affecting golang.org/x/image, image (golang).
Chance of exploitation in the next 30 days (EPSS): 0.34%, higher than 27.6% of all vulnerabilities.
Fix: update to 0.42.0, 0.39.0 or later.

Package	Affected versions	Patched versions
golang.org/x/image Go	`< 0.42.0`	`0.42.0`
image golang	`< 0.39.0`	`0.39.0`

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

NVD description

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

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Package

Affected versions

Patched versions

< 0.42.0

0.42.0

< 0.39.0

0.39.0

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