Windows apps · Application version · May 29, 2026

Go Programming Language 1.26.4

Go Programming Language 1.26.4, released May 29, 2026, fixes 3 CVEs in Go Programming Language. None of them is reported as exploited. Patch Radar priority: High. The latest Go Programming Language is 1.27.4, which also fixes every one of these CVEs.

High

Superseded. The latest Go Programming Language is 1.27.4, which also fixes every CVE on this page. Install that instead.

CVEs closed
3
None rated Critical
Exploited
0
None reported
Highest CVSS
8.8
Base score, 0 to 10
Highest EPSS
0.0059
48th percentile

Priority of the 3 CVEs

Patch now 0 Urgent 0 High 2 Routine 1

Applies to

ProductVersion
Go Programming Language1.26.4

CVEs this fix closes

PriorityCVETitleCVSSEPSSExploitation
High CVE-2026-27145 Inefficient candidate hostname parsing in crypto/x5098.2 0.0059 None reported
High CVE-2026-42504 Quadratic complexity in WordDecoder.DecodeHeader in mime8.8 0.0056 None reported
Routine CVE-2026-42507 Arbitrary inputs are included in errors without any escaping in net/textproto5.3 0.0037 None reported
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