# CVE-2026-97045: Check all ancestor namespace transitions when rendering raw text in html in golang.org/x/net

Status: published. Published: 2026-10-27. Updated: 2026-11-04.

In childTextNodesAreLiteral, walking up the tree previously stopped at the nearest foreign ancestor once an HTML integration point was found. However, that integration point may itself be a descendant of an element that was foster-parented into a foreign namespace (such as <mglyph> or <malignmark> fostered under <mtext>), causing a parser to resolve the subtree in a different foreign namespace upon re-parsing the rendered output. Continue walking the full ancestor chain and verify that every transition from a non-empty namespace occurs at an HTML integration point before emitting literal text.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- golang.org/x/net / golang.org/x/net/html (golang.org/x/net/html): ≥ 0; < 0.62.0 (affected, semver). Source: CNA: Go

## Severity and prioritization

- CVSS 3.1: 6.1 (medium); CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N; source: ADP: CISA-ADP

- CVSS 3.1: 6.1 (medium); CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N; source: NVD: 134c704f-9b21-4f2e-91b3-4a467353bcc0

- CISA KEV: No listing in collected sources

- EPSS: 0.20% as of 2026-11-04; percentile 10.20%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-79

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://go.dev/cl/855121 (CNA: Go)

- https://go.dev/issue/82622 (CNA: Go)

- https://groups.google.com/g/golang-announce/c/sqrs2vTx_Xs (CNA: Go)

- https://pkg.go.dev/vuln/GO-2026-6866 (CNA: Go)

- https://go.dev/cl/855121 (security@golang.org)

- https://go.dev/issue/82622 (security@golang.org)

- https://groups.google.com/g/golang-announce/c/sqrs2vTx_Xs (security@golang.org)

- https://pkg.go.dev/vuln/GO-2026-6866 (security@golang.org)

## Provenance

- CNA: Go: https://www.cve.org/CVERecord?id=CVE-2026-97045; retrieved 2026-11-04; source updated 2026-11-04

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-97045; retrieved 2026-11-04; source updated 2026-11-04

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-97045; retrieved 2026-11-04; source updated Not reported

Revision: 3bf07b92ed9c3ae800d08e87bdc91be2967664b00fb1a0de6afcd64212906bc2

Canonical: https://y2.dev/cve/CVE-2026-97045

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