Review reviewHigh

CVE-2026-32280

Go standard library crypto/x509, Cryostat 4 on RHEL 9, HawtIO HawtIO 4.4.0

During chain building, the amount of work that is done is not correctly limited when a large number of intermediate certificates are passed in VerifyOptions.Intermediates, which can lead to a denial of service. This affects both direct users of crypto/x509 and users of crypto/tls.

CVSS
7.5
EPSS
0.61%
46.0% percentile
CISA KEV
Not listed
Published
2026.04.08
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.61%
Technical severityCVSS 7.5

Vulnerability overview

During chain building, the amount of work that is done is not correctly limited when a large number of intermediate certificates are passed in VerifyOptions.Intermediates, which can lead to a denial of service. This affects both direct users of crypto/x509 and users of crypto/tls.

Affected product and versions

Product
Go standard library crypto/x509, Cryostat 4 on RHEL 9, HawtIO HawtIO 4.4.0
Affected versions
< 1.25.9, >= 1.26.0-0 < 1.26.2, >= 1.26.0 < 1.26.2
Fixed versions
1.25.9, 1.26.2

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Go standard library crypto/x509, Cryostat 4 on RHEL 9, HawtIO HawtIO 4.4.0 and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
CWE-770
CVE-2026-32280 — Go standard library crypto/x509, Cryostat 4 on RHEL 9, HawtIO HawtIO 4.4.0 | SECUFOCUS NOW