Bypass of meta content URL escaping causes XSS in html/template
Published May 7, 2026 · Updated Oct 23, 2026 · Also known as BIT-golang-2026-39823, GO-2026-4982
Original summary
Normalized public record · Updated Oct 23, 2026
Bypass of meta content URL escaping causes XSS in html/template
Publisher and source text is retained separately from QFinch interpretation.
QFinch assessment
CVE-2026-27142 fixed a vulnerability in which URLs were not correctly escaped inside of a <meta> tag's <content> attribute. If the URL content were to insert ASCII whitespaces around the '=' rune inside of the <content> attribute, the escaper would fail to similarly escape it, leading to XSS.
Evidence: public source recordsAffected products
| Affected package, product or range | Fix status |
|---|---|
| Consult the referenced vendor advisory for affected versions. | Consult source advisory |
Matching a version is only one part of assessing exposure. QFinch has not assessed your environment on this public page.
Remediation
Apply the vendor-supported fixed release or mitigation, then verify the affected component is no longer reachable.
- Confirm the affected product and reachable code path exist in your environment.
- Apply the vendor-supported patch or mitigation from the primary advisory.
- Rescan the exact deployed revision and retain verification evidence.
Evidence coverage
- SSVC priority
- LOW
- Confidence
- Not available
- Aliases
- BIT-golang-2026-39823, GO-2026-4982
Scores appear only when corresponding evidence exists. Missing data is never interpreted as zero risk.
Sources and record history
Record history
Published May 7, 2026 · Last refreshed Oct 23, 2026