CVE-2026-111943
High
Description
On most platforms, Go uses the given system root certificates. However, in some narrower cases, the system trust stores may not be updated without further action. To defend against the narrower set of cases that may remain affected, a denylist was added in crypto/x509 to return an error when calling Verify with any of the known intermediate certificates that are no longer considered to be trustworthy.
SeverityHigh
CVSS6.8
Exploit probability—
Product
Stdlib
PublishedOct 21, 2026
First seenOct 21, 2026
Weakness typeCWE-299CWE-299
How to fix
Update
- stdlib1.26.10, 1.27.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| stdlibGo | v < 1.26.10, 1.27.0-0 ≤ v < 1.27.3 | 1.26.10, 1.27.3 |
| microsoft azl3_golang_1.26.7-1 | No range specified | — |
| microsoft azl3_golang_1.26.10-1 | No range specified | — |
| microsoft azl3_golang_1.27.3-1 | No range specified | — |
| microsoft azl3_golang_1.27.1-1 | No range specified | — |
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