VulnerabilityPublished 27 Oct 2026

CVE-2026-97045: golang.org/x/net/html · Cross-site Scripting

Affects golang.org/x/net/htmlSource CVE Database V5

Not known to be exploited : upgrade to 0.62.0 soon.

Data as of 27 Oct 2026, 22:01 UTC

Severity

High

Rated High by Threat Radar's AI analysis · CVSS not yet scored by NVD

Patch: Available – fixed in 0.62.0

Exploitation evidence

Disclosed: evidence found.
CVE published 27 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade golang.org/x/net/html to 0.62.0.

Affected software

Product	Affected	Fixed in
golang.org/x/netgolang.org/x/net/html	Affected <0.62.0	Fixed in 0.62.0
Gogolang.org/x/net/html`pkg:golang/golang.org/x/net/html`Other threats	Affected <0.62.0	Fixed in 0.62.0

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A fix is available in golang.org/x/net/html version 0.62.0. Users should upgrade to version 0.62.0 or later to remediate this vulnerability.

Description

CVE-2026-97045 is a cross-site scripting (XSS) vulnerability in the golang.org/x/net/html package. The issue arises from improper handling of namespace transitions when walking up the DOM tree, potentially allowing literal text emission in unintended foreign namespaces. This flaw affects versions before 0.62.0 and has been fixed in version 0.62.0.

Impact

This vulnerability allows cross-site scripting (CWE-79) due to improper namespace handling in HTML parsing, which could lead to injection of malicious scripts when rendering HTML content. Exploitation could result in client-side code execution in contexts using the affected package versions.

Summary

The vulnerability occurs in the childTextNodesAreLiteral function of golang.org/x/net/html, where the ancestor tree walk previously stopped at the nearest foreign ancestor upon finding an HTML integration point. However, this integration point might be a descendant of an element foster-parented into a foreign namespace, causing the parser to resolve the subtree in a different namespace upon re-parsing. The fix involves continuing the full ancestor chain walk and verifying that every transition from a non-empty namespace occurs at an HTML integration point before emitting literal text, preventing XSS.

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (opens in a new tab)
Base weaknessLikelihood of exploit: HighCWE Top 25 (2025): #1OWASP Top 10 A05:2025: Injection (opens in a new tab)
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
Architecture and Design · Libraries or Frameworks
Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
Implementation · Architecture and Design
Understand the context in which your data will be used and the encoding that will be expected. This is especially important when transmitting data between different components, or when generating outputs that can contain multiple encodings at the same time, such as web pages or multi-part mail messages.
Architecture and Design · Implementation · Attack Surface Reduction
Understand all the potential areas where untrusted inputs can enter your software: parameters or arguments, cookies, anything read from the network, environment variables, reverse DNS lookups, query results, request headers, URL components, e-mail, files, filenames, databases, and any external systems that provide…
OWASP Cheat Sheets
Cross Site Scripting Prevention (opens in a new tab)
DOM based XSS Prevention (opens in a new tab)
Injection Prevention (opens in a new tab)
Abuse Case (opens in a new tab)
Deserialization (opens in a new tab)
OWASP ASVS 4.0.3
V5.3.3 (opens in a new tab)
V1.5.1 (opens in a new tab)
Attack patterns
XSS Using MIME Type Mismatch (opens in a new tab)
DOM-Based XSS (opens in a new tab)
Reflected XSS (opens in a new tab)
Stored XSS (opens in a new tab)
Cross-Site Scripting (XSS) (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

Community reviews

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 27 Oct 2026, 22:01 UTC

WeaknessesCWE-79

Technical details

References

Community reviews

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