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CVE-2025-47911

Quadratic parsing complexity in golang.org/x/net/html

Published: Feb 5, 2026Updated: Feb 18, 2026 Sources: CVE List NVD GHSA BDUNVD-CWE-noinfo
NVD MITRE
5.3CVSSMEDIUM
EPSS Score
0.5%
Top 61.2%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

The html.Parse function in golang.org/x/net/html has quadratic parsing complexity when processing certain inputs, which can lead to denial of service (DoS) if an attacker provides specially crafted HTML content.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:L
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:LAvailability
Low
Open in CVSS calculator →

Weaknesses

NVD-CWE-noinfo

Affected Products

golang.org/x/net/htmlgolang.org/x/net
Library
OSS Libraries / go
UbuntuCanonical Ltd.
On-premOS
Operating Systems / linux-distro
Astra Linux Special EditionООО «РусБИТех-Астра»
On-premOS
Operating Systems / linux-distro
РЕД ОСООО «Ред Софт»
On-premOS
Operating Systems / linux-distro
golang.org/x/net/htmlThe Go ProjectOSS Libraries
golang.org/x/netoss-projectOSS Librariesaka golang.org/x/net
canonical ltd.commercialGBOperating Systemsaka canonical
ооо «русбитех-астра»commercialRUOperating Systemsaka rusbitech-astra
ооо «ред софт»commercialRUOperating Systemsaka red soft
the go projectoss-projectOSS Librariesaka go, golang-google-protobuf, crypto
and 3 more affected products View all →

Exploitability

Official Patch Available

References

https://go.dev/cl/709876
go.dev
https://github.com/golang/vulndb/issues/4440
github.com
https://groups.google.com/g/golang-announce/c/jnQcOYpiR2c
groups.google.com
and 14 more references View all →

Timeline

Published
Feb 5, 2026
Last Updated
Feb 18, 2026

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