Semantic Version (Full SemVer 2.0.0) Regex for Go

What this pattern does

This page provides a comprehensive, battle-tested regular expression for matching semantic version (full semver 2.0.0), ported and verified for Go. A rigorously tested regex reduces debugging time and protects your application from edge-case failures. The snippet below is ready to drop into your Go project — whether you're validating in a Gin handler, a gRPC service, or a command-line tool.

Go Implementation

// Semantic Version (Full SemVer 2.0.0)
// ReDoS-safe | RegexVault — Dev & Systems > SemVer

package validation

import "regexp"

var semanticVersionFullSemver200Re = regexp.MustCompile(`^(0|[1-9][0-9]*)\.(0|[1-9][0-9]*)\.(0|[1-9][0-9]*)(?:-((?:0|[1-9][0-9]*|[0-9]*[a-zA-Z\-][a-zA-Z0-9\-]*)(?:\.(?:0|[1-9][0-9]*|[0-9]*[a-zA-Z\-][a-zA-Z0-9\-]*))*))?(?:\+([a-zA-Z0-9\-]+(?:\.[a-zA-Z0-9\-]+)*))?$`)

func ValidateSemanticVersionFullSemver200(s string) bool {
    return semanticVersionFullSemver200Re.MatchString(s)
}

// Example
// fmt.Println(ValidateSemanticVersionFullSemver200("1.0.0")) // true

Test Cases

When to use this pattern

This pattern is drawn from the Dev & Systems > SemVer category and carries a ReDoS-safe certification. That matters for Go developers because Go's RE2 engine is inherently safe from catastrophic backtracking, but this pattern has been additionally verified for correctness. RegexVault audits patterns against known backtracking attack vectors, ensuring you have the necessary context before using this regex in a high-stakes production environment.

Common Pitfalls

Technical Notes

Official SemVer 2.0.0 regex from semver.org. Capture groups: 1=MAJOR, 2=MINOR, 3=PATCH, 4=pre-release, 5=build metadata. Leading zeros in numeric identifiers are forbidden.