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.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| golang.org/x/net | golang.org/x/net/html | unaffected |
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References
History
Tue, 27 Oct 2026 21:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | Avoid quadratic complexity when coalescing text nodes in html in golang.org/x/net | |
| References |
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MITRE
Status: PUBLISHED
Assigner: Go
Published:
Updated: 2026-10-27T21:38:56.517Z
Reserved: 2026-08-24T23:36:15.738Z
Link: CVE-2026-78661
Vulnrichment
No data.
NVD
Status : Received
Published: 2026-10-27T22:18:05.930
Modified: 2026-10-27T22:18:05.930
Link: CVE-2026-78661
Redhat
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OpenCVE Enrichment
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Weaknesses
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