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fix(sanitizer): match attribute quotes by type to avoid mangling content (#1371)

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stripHiddenAttributes used the pattern `["'][^"']*["']` for each quoted
attribute, which matches an opening quote of either type and stops at the
first quote of either type. When a value contained the other quote
character — e.g. an apostrophe inside a double-quoted attribute like
`title="We'll do it"` — the match terminated at the apostrophe, so the
wrong span was removed and the surrounding text was corrupted (e.g.
`<Tooltip title="We'll do it" placement="top">` became
`<Tooltipll do it" placement="top">`).

This surfaced via the github_inline_comment MCP tool: suggestion blocks
whose code lines contain quotes were mangled before posting (#1366).

Match each quoted form per quote type (`"[^"]*"` and `'[^']*'`),
mirroring stripMarkdownLinkTitles, so a value may freely contain the
other quote character. The unquoted fallback is unchanged.

Closes #1366

Co-authored-by: bymle <229636660+bymle@users.noreply.github.com>
This commit is contained in:
bymle 2026-06-12 12:19:44 +08:00 committed by GitHub
parent 24b915648e
commit 36617bd48b
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2 changed files with 28 additions and 5 deletions
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18
src/github/utils/sanitizer.ts
View File

@ -20,15 +20,23 @@ export function stripMarkdownLinkTitles(content: string): string {
}
export function stripHiddenAttributes(content: string): string {
content = content.replace(/\salt\s*=\s*["'][^"']*["']/gi, "");
// Quoted values are matched per quote type so that a value containing the
// other quote character (e.g. an apostrophe inside a double-quoted value)
// does not terminate the match early and mangle surrounding content (#1366).
content = content.replace(/\salt\s*=\s*"[^"]*"/gi, "");
content = content.replace(/\salt\s*=\s*'[^']*'/gi, "");
content = content.replace(/\salt\s*=\s*[^\s>]+/gi, "");
content = content.replace(/\stitle\s*=\s*["'][^"']*["']/gi, "");
content = content.replace(/\stitle\s*=\s*"[^"]*"/gi, "");
content = content.replace(/\stitle\s*=\s*'[^']*'/gi, "");
content = content.replace(/\stitle\s*=\s*[^\s>]+/gi, "");
content = content.replace(/\saria-label\s*=\s*["'][^"']*["']/gi, "");
content = content.replace(/\saria-label\s*=\s*"[^"]*"/gi, "");
content = content.replace(/\saria-label\s*=\s*'[^']*'/gi, "");
content = content.replace(/\saria-label\s*=\s*[^\s>]+/gi, "");
content = content.replace(/\sdata-[a-zA-Z0-9-]+\s*=\s*["'][^"']*["']/gi, "");
content = content.replace(/\sdata-[a-zA-Z0-9-]+\s*=\s*"[^"]*"/gi, "");
content = content.replace(/\sdata-[a-zA-Z0-9-]+\s*=\s*'[^']*'/gi, "");
content = content.replace(/\sdata-[a-zA-Z0-9-]+\s*=\s*[^\s>]+/gi, "");
content = content.replace(/\splaceholder\s*=\s*["'][^"']*["']/gi, "");
content = content.replace(/\splaceholder\s*=\s*"[^"]*"/gi, "");
content = content.replace(/\splaceholder\s*=\s*'[^']*'/gi, "");
content = content.replace(/\splaceholder\s*=\s*[^\s>]+/gi, "");
return content;
}

15
test/sanitizer.test.ts
View File

@ -131,6 +131,21 @@ describe("stripHiddenAttributes", () => {
),
).toBe('<img src="pic.jpg" class="image">');
});
it("should not corrupt content when an attribute value contains the other quote type", () => {
// Regression for #1366: an apostrophe inside a double-quoted attribute
// (or a double quote inside a single-quoted attribute) must not cause the
// closing quote to be mismatched, which previously mangled later text.
expect(
stripHiddenAttributes(`<Tooltip title="We'll do it" placement="top">`),
).toBe('<Tooltip placement="top">');
expect(
stripHiddenAttributes(`<img alt="Bob's avatar" src="pic.jpg">`),
).toBe('<img src="pic.jpg">');
expect(stripHiddenAttributes(`<div title='say "hi"'>Content</div>`)).toBe(
"<div>Content</div>",
);
});
});
describe("normalizeHtmlEntities", () => {