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wave pushed a commit to branch check-crlf-in-headers
in repository https://gitbox.apache.org/repos/asf/tooling-trusted-releases.git

commit e3afe4241560b9950ce089645698ba7024721e36
Author: Dave Fisher <[email protected]>
AuthorDate: Tue Mar 3 10:35:41 2026 -0800

    Validate no CR/LF in http header values
---
 atr/web.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/atr/web.py b/atr/web.py
index 47bdd842..ce2a4656 100644
--- a/atr/web.py
+++ b/atr/web.py
@@ -245,6 +245,8 @@ class HeaderValue:
                 raise ValueError(f"Header value cannot contain double quotes: 
{text}")
             if "\x00" in text:
                 raise ValueError(f"Header value cannot contain null bytes: 
{text}")
+            if ("\r" in text) or ("\n" in text):
+                raise ValueError(f"Header value cannot contain CR/LF 
characters: {text}")
 
         headers = werkzeug.datastructures.headers.Headers()
         headers.add("X-Header-Value", value, **kwargs)


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