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c01de718b2fb8e7706a0fede0e5ea4149ac6f378 braney Mon Aug 31 13:48:13 2026 -0700 htmlSanitize: six fixes from a second review of it, refs #38126 Filter the style attribute on the text a browser will see. A browser turns a character reference into the character it names before the CSS parser runs, so a value spelled url( reached the page as url( and walked past the check that is there to stop it. The value is decoded before the check now, and the author is told which property lost its value. Say something when we drop the rest of the page. A tag that never ends, most often an attribute value whose quote is never closed, threw away everything after it and reported nothing, so hubCheck stayed quiet about it. The depth cap did the same. Write a less than sign that starts no tag as <. A browser reads text like "', which could eat a closing tag we added. Write an attribute once. A browser keeps the first of a repeated attribute and drops the rest. We checked the first and then printed them all, which was only correct because of that rule. Do not stack a second descPage- prefix on an id we already renamed, and do not add a second noopener noreferrer to a rel that already has one. hgCustom hands the text we returned back to us when a custom track is edited and saved again, so both of these grew a little more on every save. The test now re-runs the filter over its own output and prints any case that changes, so a transform that compounds shows up in the diff. diff --git src/lib/tests/htmlSanitizeTest.c src/lib/tests/htmlSanitizeTest.c index 5f18da8167a..cd081f855cd 100644 --- src/lib/tests/htmlSanitizeTest.c +++ src/lib/tests/htmlSanitizeTest.c @@ -1,74 +1,100 @@ /* htmlSanitizeTest - check that htmlSanitize keeps what it should and drops the rest. */ /* Copyright (C) 2026 The Regents of the University of California * See kent/LICENSE or http://genome.ucsc.edu/license/ for licensing information. */ #include "common.h" #include "htmlSanitize.h" static char *cases[] = { /* a whole pasted document comes out as the article it was meant to be */ "T" "

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", /* script and style go, with their contents */ "

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", /* a script that is never closed takes the rest with it */ "

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