Home/CVE/Validating certificate chains which use policies is unexpectedly inefficient when certificates in the chain contain a ve
CVE

CVE-2026-32281

Validating certificate chains which use policies is unexpectedly inefficient when certificates in the chain contain a ve

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.

HIGH · CVSS 7.5 EPSS 0.00022
Schedule remediation
  • SSVC automatable: yes - attacks can be scripted at scale
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-295Improper Certificate Validation
▤

Affected Products & Versions

2
golang go< 1.25.9
golang go>= 1.26.0 and < 1.26.2
▤

Affected Packages

1
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
Go stdlib fixed in 1.25.9, 1.26.2
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · security@golang.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD08 Apr 2026 · 02:16 AM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
yes
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

30
rhsaRHSA-2026:20943Important
rhsaRHSA-2026:20947Important
rhsaRHSA-2026:21338Important
rhsaRHSA-2026:21769Important
rhsaRHSA-2026:22347Important
🔗

References & Sources

4
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://go.dev/cl/758061Patch
https://go.dev/issue/78281Issue Tracking
https://groups.google.com/g/golang-announce/c/0uYbvbPZRWUIssue TrackingRelease Notes
https://pkg.go.dev/vuln/GO-2026-4946Vendor Advisory
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