CVE-2026-32281

Inefficient policy validation in crypto/x509

HIGH

7.5

CVSS Score

Published: April 8, 2026 at 01:06 AM UTC

Updated: July 25, 2026 at 10:21 AM UTC

2 products affected across 2 vendorsGoCrypto/x509

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Severity

HIGH7.5

Exploit prediction

EPSS 0.4%

SSVC

No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Go · Golang

95%

v < 1.25.91.26.0 ≤ v < 1.26.2

Affected range stops below 1.25.9, so it looks safe — our inference, not a vendor statement

Affected range stops below 1.26.2, so it looks safe — our inference, not a vendor statement

Crypto/x509 · Go Standard Librarygo

60%

v < 1.25.91.26.0-0 ≤ v < 1.26.21.26.0-0

Affected range stops below 1.25.9, so it looks safe — our inference, not a vendor statement

Affected range stops below 1.26.2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (4)

Patch

Source: cverecord

https://go.dev/cl/758061

Issue Tracking

Source: cverecord

https://go.dev/issue/78281

Issue TrackingRelease Notes

Source: cverecord

https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU

Vendor Advisory

Source: cverecord

https://pkg.go.dev/vuln/GO-2026-4946

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHCISA-ADP

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: NONE
Integrity: NONE
Availability: HIGH

Vector?

Quick Info

StatusANALYZED

CWE

CWE-295

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