What is CVE-2026-32289?

CVE-2026-32289 is a medium-severity vulnerability in Golang Go, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-04-08.

How severe is CVE-2026-32289?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Golang Go

CVE-2026-32289

Context was not properly tracked across template branches for JS template literals, leading to possibly incorrect escaping of content when branches were used. Additionally template actions within JS template literals did not properly track the brace depth, leading to incorrect escaping being applied. These issues could cause actions within JS template literals to be incorrectly or improperly escaped, leading to XSS vulnerabilities.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2026-04-08 · last modified 2026-07-25.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.003 (23.9th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 24th percentile — 23.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000

Affected products

Golang Go
Go Standard Library Html/template — versions 0, 1.26.0-0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

go.dev/cl/763762 (Patch)
go.dev/issue/78331 (Issue Tracking)
groups.google.com/g/golang-announce/c/0uYbvbPZRWU (Mailing List, Release Notes)
pkg.go.dev/vuln/GO-2026-4865 (Vendor Advisory)

Frequently asked questions

What is CVE-2026-32289?: CVE-2026-32289 is a medium-severity vulnerability in Golang Go, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-04-08.
How severe is CVE-2026-32289?: Medium severity. CVSS v3 base score is 6.1 out of 10.