CVE-2026-32289 JsBraceDepth Context Tracking Bugs (XSS) in html/template
Incorrect escaping in Go's html/template allows XSS via JS template literals, requiring developers to upgrade the standard library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-32289?
CVE-2026-32289 is a medium-severity cross-site scripting vulnerability in Golang Go, published on 8 Apr 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
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.
Weakness: CWE-79
Which versions are affected by CVE-2026-32289?
2 open source packages ship an affected version, including golang and stdlib. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
golang Bitnami | All versions | 1.25.9, 1.26.2 |
stdlib Go | All versions | 1.25.9, 1.26.2 |
Products include Golang Go.
How do I fix CVE-2026-32289?
Upgrade golang to a fixed version for your release line: 1.25.9 or 1.26.2.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-32289 being exploited?
There is no known exploitation of CVE-2026-32289 in the wild and no public exploit code.
Other vulnerabilities in Golang Go
- CVE-2020-0601 Microsoft Windows CryptoAPI Spoofing
- CVE-2026-27143 Missing bound checks can lead to memory corruption in safe Go in cmd/compile
- CVE-2024-24790 Unexpected behavior from Is methods for IPv4-mapped IPv6 addresses in net/netip
- CVE-2023-39320 Arbitrary code execution via go.mod toolchain directive in cmd/go
- CVE-2023-24540 Improper handling of JavaScript whitespace in html/template
Sources
Also known as AZL-98763, BELL-CVE-2026-32289, BIT-golang-2026-32289, CLEANSTART-2026-BX15476, CLEANSTART-2026-CL50789, CLEANSTART-2026-DE84395 and 642 more.