{"id":"CVE-2026-78661","published":"2026-10-27T22:18:05.930","lastModified":"2026-10-27T22:18:05.930","description":"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 text runs separated by ignored end tags (such as \"a</x>\") caused O(n^2) allocations and byte copies. Accumulate coalesced text in per-node byte slices during parsing and materialize Data strings once at the end of parse.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":[],"vendors":[],"products":[],"references":[{"url":"https://go.dev/cl/849365","tags":[]},{"url":"https://go.dev/issue/82224","tags":[]},{"url":"https://groups.google.com/g/golang-announce/c/sqrs2vTx_Xs","tags":[]},{"url":"https://pkg.go.dev/vuln/GO-2026-6860","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}