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.
Metrics
Affected Vendors & Products
| Vendors | Products |
|---|---|
| Golang |
|
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References
History
Wed, 28 Oct 2026 22:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Golang
Golang net |
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| Vendors & Products |
Golang
Golang net |
Tue, 27 Oct 2026 23:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Weaknesses | CWE-770 |
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 |
|
MITRE
Status: PUBLISHED
Assigner: Go
Published: 2026-10-27T21:38:56.517Z
Updated: 2026-10-27T21:38:56.517Z
Reserved: 2026-08-24T23:36:15.738Z
Link: CVE-2026-78661
Vulnrichment
No data.
NVD
Status : Deferred
Published: 2026-10-27T22:18:05.930
Modified: 2026-10-28T15:24:56.033
Link: CVE-2026-78661
Redhat
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