CVE-2023-3978: vulnerability in golang.org/x/net/html
Improper rendering of text nodes in golang.org/x/net/html
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
3Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 0.9%
Text nodes not in the HTML namespace are incorrectly literally rendered, causing text which should be escaped to not be. This could lead to an XSS attack.
Affected products
golang.org/x/net · golang.org/x/net/htmlRelated CVEs — golang.org/x/net/html
In the same product, most dangerous first.
CVE-2024-45338MEDIUMNon-linear parsing of case-insensitive content in golang.org/x/net/htmlEPSS 1.1%CVE-2025-47911MEDIUMQuadratic parsing complexity in golang.org/x/net/htmlEPSS 0.6%CVE-2025-22872MEDIUMIncorrect Neutralization of Input During Web Page Generation in x/net in golang.org/x/netEPSS 0.5%CVE-2025-58190MEDIUMInfinite parsing loop in golang.org/x/netEPSS 0.5%CVE-2026-78661HIGHAvoid quadratic complexity when coalescing text nodes in html in golang.org/x/netEPSS 0.4%CVE-2026-25680MEDIUMInvoking denial of service when parsing arbitrary HTML in golang.org/x/net/htmlEPSS 0.3%