CVE-2026-78661Published
When coalescing adjacent text nodes in addText and fosterParent, appending to an existing TextNode's Data via string concatenation (n.Data += text) reallocated and copied the accumulated string on every token. Inputs containing many short t…
Exact source revision recorded 29 Oct 2026 21:50:49 UTC. It does not establish the source's current position. Latest evidence.
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CVE-2026-78661 · Microsoft / collected KEV context
nvd · CVE-2026-78661
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