Metrics
Affected Vendors & Products
Fri, 29 May 2026 15:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| CPEs | cpe:2.3:a:golang:net:*:*:*:*:*:go:*:* |
Wed, 27 May 2026 14:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
cvssV3_1
|
cvssV3_1
|
Mon, 25 May 2026 12:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Golang
Golang net |
|
| Vendors & Products |
Golang
Golang net |
Fri, 22 May 2026 20:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Weaknesses | CWE-20 CWE-264 |
Fri, 22 May 2026 18:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Weaknesses | CWE-1289 | |
| Metrics |
cvssV3_1
|
Fri, 22 May 2026 16:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Weaknesses | CWE-20 CWE-264 |
Fri, 22 May 2026 15:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | The ToASCII and ToUnicode functions incorrectly accept Punycode-encoded labels that decode to an ASCII-only label. For example, ToUnicode("xn--example-.com") incorrectly returns the name "example.com" rather than an error. This behavior can lead to privilege escalation in programs using the idna package. For example, a program which performs privilege checks on the ASCII hostname may reject "example.com" but permit "xn--example-.com". If that program subsequently converts the ASCII hostname to Unicode, it will inadvertently permits access to the Unicode name "example.com". | |
| Title | Invoking failure to reject ASCII-only Punycode-encoded labels in golang.org/x/net/idna | |
| References |
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Status: PUBLISHED
Assigner: Go
Published: 2026-05-22T15:01:21.462Z
Updated: 2026-05-27T13:13:15.606Z
Reserved: 2026-04-07T18:13:03.526Z
Link: CVE-2026-39821
Updated: 2026-05-22T18:01:10.401Z
Status : Analyzed
Published: 2026-05-22T16:16:20.410
Modified: 2026-05-29T15:26:37.163
Link: CVE-2026-39821
No data.