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Advisory record · GO-2026-6866

Check all ancestor namespace transitions when rendering raw text in html in golang.org/x/net

CVSS 6.1 MediumEPSS 0.0027 · 18th percentile

Published by OSV at 27 Oct 2026, 21:16 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
golang.org/x/netGo<0.62.00.62.0
Identifiers
GO-2026-6866 · CVE-2026-97045
Weakness (CWE)
CWE-79
Tags
Published
27 Oct 2026
Updated
27 Oct 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Versions of golang.org/x/net before 0.62.0 are affected. An attacker who can supply HTML that a program re-renders may be able to cause the rendered output to be parsed into a different namespace on re-parsing, which can change how the content is interpreted. The source gives few details on the exact impact. Upgrade to golang.org/x/net 0.62.0 or later.

Written 1 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
6.1 Medium 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N ADP (CISA-ADP)
  • CISA KEV Not listed.
  • EPSS 0.0027, the 18th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 27 Oct 2026, 21:38 UTC Confirmed by the CVE List
  2. 27 Oct 2026, 22:19 UTC Confirmed by NVD
  3. 31 Oct 2026, 14:11 UTC First seen by agentprime
  4. 31 Oct 2026, 14:11 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.