diff --git a/CHANGES.md b/CHANGES.md
index ecddb0436..2be301a67 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,6 +1,6 @@
 # Changes
 
-## 3.15.0 (2026-03-XX)
+## 3.15.0 (2026-04-XX)
 
 ### Development
 
@@ -18,6 +18,7 @@ This version of the Markdown package has fixed the following issues:
 - Strip leading and trailing spaces for `inlineHtmlComment` renderers. (#635)
 - Specify `.value_required:n = { true }` for all options that require values.
   (discovered by @michal-h21 in #615, fixed in #640)
+- Parse the content of inline HTML comments. (described in #641, fixed in #642)
 
 ### Continuous integration
 
diff --git a/markdown.dtx b/markdown.dtx
index 004b32f8f..9993ae9db 100644
--- a/markdown.dtx
+++ b/markdown.dtx
@@ -32155,8 +32155,7 @@ parsers.html_comment
 
 parsers.html_inline_comment = (parsers.html_comment_start / "")
                             * -P(">") * -P("->")
-                            * Cs(( V("NoSoftLineBreakEndline")
-                                 + parsers.any
+                            * Cs(( parsers.any
                                  - parsers.nested_breaking_blank
                                  - parsers.html_comment_end)^0)
                             * (parsers.html_comment_end / "")
@@ -32357,8 +32356,7 @@ parsers.html_any_block  = parsers.html_any_block_opening
 
 parsers.html_inline_comment_full  = parsers.html_comment_start
                                   * -P(">") * -P("->")
-                                  * Cs(( V("NoSoftLineBreakEndline")
-                                       + parsers.any - P("--")
+                                  * Cs(( parsers.any - P("--")
                                        - parsers.nested_breaking_blank
                                        - parsers.html_comment_end)^0)
                                   * parsers.html_comment_end
@@ -34283,6 +34281,7 @@ end
   if options.htmlOutput == "commonmark" then
     parsers.InlineHtml
       = Cs(parsers.html_inline_comment)
+      / self.parser_functions.parse_inlines_no_html
       / writer.inline_html_comment
       + Cs(parsers.html_any_empty_inline_tag)
       / writer.inline_html_empty_tag
@@ -34298,6 +34297,7 @@ end
       / writer.inline_html_close_tag
   else
     parsers.InlineHtml = Cs(parsers.html_inline_comment)
+                       / self.parser_functions.parse_inlines_no_html
                        / writer.inline_html_comment
                        + Cs( parsers.html_any_empty_inline_tag
                            + parsers.html_inline_instruction
diff --git a/tests/testfiles/regression/github/issue-641.test b/tests/testfiles/regression/github/issue-641.test
new file mode 100644
index 000000000..8b7a055a0
--- /dev/null
+++ b/tests/testfiles/regression/github/issue-641.test
@@ -0,0 +1,7 @@
+<<<
+foo <!-- bar
+_baz_ -->
+>>>
+BEGIN document
+inlineHtmlComment: bar(softLineBreak)(emphasis: baz)
+END document