What’s Vulnerable › Vulnerabilities

CVE-2026-33813: Panic when decoding large WEBP image on 32-bit platforms in golang.org/x/image

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-04-21 · updated 2026-10-26

Description

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

Affected products

• golang.org/x/image/webp: before 0.39.0 — fixed in 0.39.0

How to fix

Upgrade to a fixed version: golang.org/x/image/webp 0.39.0. Check the vendor advisory for mitigations.

References

• https://go.dev/cl/759860
• https://go.dev/cl/780860
• https://go.dev/issue/78407
• https://pkg.go.dev/vuln/GO-2026-4961

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