What’s Vulnerable › Vulnerabilities

CVE-2026-56851: Panic parsing crafted input in x/text/secure/precis in golang.org/x/text

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-07 · updated 2026-10-08
• Weakness: CWE-787

Description

The Nickname profile can panic with an out-of-bounds slice error when transforming crafted input into a short destination buffer.

Affected products

• Golang.Org/X/Text: before 0.41.0 — fixed in 0.41.0
• golang.org/x/text/secure/precis: before 0.41.0 — fixed in 0.41.0

How to fix

Upgrade to a fixed version: Golang.Org/X/Text 0.41.0; golang.org/x/text/secure/precis 0.41.0. Check the vendor advisory for mitigations.

References

• https://go.dev/cl/793360
• https://go.dev/issue/80112
• https://pkg.go.dev/vuln/GO-2026-6629

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