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.

Recorded JSON

nvd · CVE-2026-78661

Published

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.

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.

Source analysis status: Deferred

Original publisher date fields

published: 2026-10-27T22:18:05.930

lastModified: 2026-10-28T15:24:56.033

Source published: 27 Oct 2026 22:18:05 UTC
Source modified: 28 Oct 2026 15:24:56 UTC
Observed here: 29 Oct 2026 21:50:49 UTC
Source terms: NIST NVD usage terms; underlying source attribution retained

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: nvd · NIST NVD usage terms; underlying source attribution retained. Source text is retained; field grouping and change labels are provided by ChangeIntel.