What’s Vulnerable › Vulnerabilities

CVE-2026-33812: Excessive memory allocation when decoding malicious SFNT in golang.org/x/image

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-04-21 · updated 2026-10-26
• Weakness: CWE-770

Description

Parsing a malicious font file can cause excessive memory allocation.

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/761180
• https://go.dev/issue/78382
• https://pkg.go.dev/vuln/GO-2026-4962

Get alerted when CVE-2026-33812 or the next vulnerability affects your stack