Invoking denial of service when parsing arbitrary HTML in golang.org/x/net/html

MITRE NVD CVE.ORG JSON API Print: PDF PDF

Summary

CVECVE-2026-25680
StatePUBLISHED
AssignerGo
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-22 16:16:19 UTC
Updated2026-05-29 15:47:57 UTC
DescriptionParsing arbitrary HTML can consume excessive CPU time, possibly leading to denial of service.

Risk And Classification

Primary CVSS: v3.1 6.5 MEDIUM from ADP

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

EPSS: 0.000610000 probability, percentile 0.192450000 (date 2026-06-02)

Problem Types: CWE-400 | CWE-407: Inefficient Algorithmic Complexity

VersionSourceTypeScoreSeverityVector
3.1ADPDECLARED6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Golang Net All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Golang.orgxnet Golang.org/x/net/html affected 0.55.0 semver Not specified

References

ReferenceSourceLinkTags
go.dev/issue/79573 [email protected] go.dev Issue Tracking
pkg.go.dev/vuln/GO-2026-5028 [email protected] pkg.go.dev Vendor Advisory
go.dev/cl/781702 [email protected] go.dev Issue Tracking
groups.google.com/g/golang-announce/c/iI-mYSI0lu8 [email protected] groups.google.com Mailing List
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: IPC Labs (en)

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