Simon Willison • 11/5/2025

Removing XSLT for a more secure browser

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Chrome has officially announced plans to deprecate and remove XSLT support by version 155 in November 2026, citing significant security risks. Firefox and WebKit are also following suit. The primary reason is that the underlying C/C++ libraries (like libxslt) are complex, aging, and susceptible to memory safety vulnerabilities, posing an unnecessary threat to browser security.

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#deprecation #memory safety #Xslt
Removing XSLT for a more secure browser

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