{"id":"CVE-2026-78661","revision":"2bed8d8a1a464ca3b8a50339f2427d5b","records":[{"revision":"2bed8d8a1a464ca3b8a50339f2427d5b","observedAt":"2026-10-29T21:50:49.331+00:00","statement":{"source":"nvd","id":"CVE-2026-78661","aliases":[],"title":"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…","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.","state":0,"publishedAt":"2026-10-27T22:18:05.93+00:00","modifiedAt":"2026-10-28T15:24:56.033+00:00","affected":[],"metrics":[],"references":["https://go.dev/cl/849365","https://go.dev/issue/82224","https://groups.google.com/g/golang-announce/c/sqrs2vTx_Xs","https://pkg.go.dev/vuln/GO-2026-6860"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-78661","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Deferred","weaknesses":[],"productCriteria":[],"sourceDates":{"published":"2026-10-27T22:18:05.930","lastModified":"2026-10-28T15:24:56.033"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-78661","identifiers":["CVE-2026-78661"]},"retained":false,"historicalAffected":[]}],"coverage":[]}