What’s Vulnerable › Vulnerabilities

CVE-2026-27141: Sending certain HTTP/2 frames can cause a server to panic in golang.org/x/net

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-02-26 · updated 2026-06-17
• Weakness: CWE-476

Description

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

Affected products

• golang.org/x/net/http2: from 0.50.0 before 0.51.0 — fixed in 0.51.0

How to fix

Upgrade to a fixed version: golang.org/x/net/http2 0.51.0. Check the vendor advisory for mitigations.

References

• https://go.dev/cl/746180
• https://go.dev/issue/77652
• https://nvd.nist.gov/vuln/detail/CVE-2026-27141
• https://pkg.go.dev/vuln/GO-2026-4559

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