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Valid email address should only start with alphanumeric (#28174)

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This fixes issue #27847 where regular expression allowed email address
to start with special symbols. Valid email addresses should start with
alphanumeric character, and as such will be rendered as email.

Added test cases from the bug report to validate, such input will not be
rendered anymore as email address.

---------

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
This commit is contained in:
Dejan Kitic 2025-04-20 12:18:14 +01:00 • committed by GitHub
parent 6d3c6741ec
commit af6be75adb
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GPG key ID: B5690EEEBB952194
3 changed files with 43 additions and 10 deletions
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14
modules/markup/html_email.go
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@ -3,7 +3,11 @@
package markup
import "golang.org/x/net/html"
import (
"strings"
"golang.org/x/net/html"
)
// emailAddressProcessor replaces raw email addresses with a mailto: link.
func emailAddressProcessor(ctx *RenderContext, node *html.Node) {
@ -14,6 +18,14 @@ func emailAddressProcessor(ctx *RenderContext, node *html.Node) {
return
}
var nextByte byte
if len(node.Data) > m[3] {
nextByte = node.Data[m[3]]
}
if strings.IndexByte(":/", nextByte) != -1 {
// for cases: "git@gitea.com:owner/repo.git", "https://git@gitea.com/owner/repo.git"
return
}
mail := node.Data[m[2]:m[3]]
replaceContent(node, m[2], m[3], createLink(ctx, "mailto:"+mail, mail, "" /*mailto*/))
node = node.NextSibling.NextSibling