Memory Allocation with Excessive Size Value Affecting golang.org/x/image/font/sfnt package, versions <0.39.0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-GOLANG-GOLANGORGXIMAGEFONTSFNT-16135922
- published6 May 2026
- disclosed21 Apr 2026
- creditAndy Gill, ZephrSec Ltd
Introduced: 21 Apr 2026
CVE-2026-33812 (opens in a new tab)How to fix?
Upgrade golang.org/x/image/font/sfnt to version 0.39.0 or higher.
Overview
Affected versions of this package are vulnerable to Memory Allocation with Excessive Size Value through the source.view path in font/sfnt. An attacker can force the parser to allocate a large read buffer by supplying a corrupt or malicious font file that advertises data beyond the file's actual contents, triggering a ReadAt request for more than 1 MiB. This can exhaust memory during font parsing, causing the process to slow down or fail while handling untrusted font data.