Medium severity · published May 22, 2026
CVE-2026-25680
Invoking denial of service when parsing arbitrary HTML in golang.org/x/net/html
6.5
CVSS
0.3%
EPSS
No
On KEV
Description
Parsing arbitrary HTML can consume excessive CPU time, possibly leading to denial of service.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 26% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GO
golang.org/x/net/html · golang.org/x/net
before 0.55.0 · source: vendor
NE
Net · Golang
before 0.55.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-25680
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-25680
Issue Tracking
https://go.dev/cl/781702
Issue Tracking
https://go.dev/issue/79573
Mailing List
https://groups.google.com/g/golang-announce/c/iI-mYSI0lu8
Vendor Advisory
https://pkg.go.dev/vuln/GO-2026-5028
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6.1
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6.1
CVE-2026-42506
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5.3
CVE-2024-45338
Non-linear parsing of case-insensitive content in golang.org/x/net/html