CVE-2026-32281
High
Description
Validating certificate chains which use policies is unexpectedly inefficient when certificates in the chain contain a very large number of policy mappings, possibly causing denial of service. This only affects validation of otherwise trusted certificate chains, issued by a root CA in the VerifyOptions.Roots CertPool, or in the system certificate pool.
SeverityHigh
CVSS7.5
Exploit probability—
ProductGo
PublishedApr 8, 2026
First seenApr 8, 2026
Weakness typeCWE-407CWE-407
How to fix
Update
- golang go1.25.9, 1.26.2 or later
- stdlib1.25.9, 1.26.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| golang go | v < 1.25.9, 1.26.0 ≤ v < 1.26.2 | 1.25.9, 1.26.2 |
| stdlibGo | v < 1.25.9, 1.26.0-0 ≤ v < 1.26.2 | 1.25.9, 1.26.2 |
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