Sending certain HTTP/2 frames can cause a server to panic in golang.org/x/net

HIGH 7.5CVE-2026-27141 · GO-2026-4559 · Published 26/02/2026 · updated 17/06/2026

In short

CVE-2026-27141 is a HIGH (CVSS 7.5) vulnerability affecting golang.org/x/net.
Chance of exploitation in the next 30 days (EPSS): 0.57%, higher than 47.1% of all vulnerabilities.
Fix: update to 0.51.0 or later.

Package	Affected versions	Patched versions
golang.org/x/net Go	`≥ 0.50.0, < 0.51.0`	`0.51.0`

Due to missing nil check, sending 0x0a-0x0f HTTP/2 frames will cause a running server to panic

NVD description

Due to missing nil check, sending 0x0a-0x0f HTTP/2 frames will cause a running server to panic

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Package

Affected versions

Patched versions

≥ 0.50.0, < 0.51.0

0.51.0

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