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Chromium's net::HttpRequestHeaders::SetHeader() uses CHECK() to enforce valid header names and values, which causes a fatal crash if the caller passes invalid strings. When users modify requestHeaders in the onBeforeSendHeaders callback with invalid header names (e.g. containing spaces) or invalid header values (e.g. containing CRLF), the gin::Converter<net::HttpRequestHeaders>::FromV8() calls SetHeader() directly, triggering the CHECK and crashing the process. This change adds pre-validation using net::HttpUtil::IsValidHeaderName() and net::HttpUtil::IsValidHeaderValue() before calling SetHeader(), silently skipping invalid headers instead of crashing. Co-authored-by: loufulton <loufulton.cz@gmail.com>
Co-authored-by: Charles Kerr <charles@charleskerr.com> Co-authored-by: loufultoncz-coder <loufulton.cz@gmail.com>
Co-authored-by: Charles Kerr <charles@charleskerr.com> Co-authored-by: loufultoncz-coder <loufulton.cz@gmail.com>
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jkleinsc
approved these changes
Apr 28, 2026
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Backport of #51340
See that PR for details.
Notes: Fixed a crash when providing invalid HTTP header names or values in the
webRequest.onBeforeSendHeaders()callback