High severity · published Jul 21, 2026
CVE-2026-56852
Infinite loop on invalid input in golang.org/x/text
7.5
CVSS
0.5%
EPSS
No
On KEV
Description
A norm.Iter can enter an infinite loop when handling input containing invalid UTF-8 bytes.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 41% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GO
golang.org/x/text/unicode/norm · golang.org/x/text
before 0.39.0 · source: vendor
Affected product
GO
golang.org/x/text/unicode/norm
golang.org/x/text