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Review reviewHigh

CVE-2026-33487

russellhaering goxmldsig, Multicluster Global Hub 1.3.4, Multicluster Global Hub 1.5.4

goxmlsig provides XML Digital Signatures implemented in Go. Prior to version 1.6.0, the `validateSignature` function in `validate.go` goes through the references in the `SignedInfo` block to find one that matches the signed element's ID. In Go versions before 1.22, or when `go.mod` uses an older version, there is a loop variable capture issue. The code takes the address of the loop variable `_ref` instead of its value. As a result, if more than one reference matches the ID or if the loop logic is incorrect, the `ref` pointer will always end up pointing to the last element in the `SignedInfo...

CVSS
7.5
EPSS
0.30%
22.2% percentile
CISA KEV
Not listed
Published
2026.03.27
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.30%
Technical severityCVSS 7.5

Vulnerability overview

goxmlsig provides XML Digital Signatures implemented in Go. Prior to version 1.6.0, the `validateSignature` function in `validate.go` goes through the references in the `SignedInfo` block to find one that matches the signed element's ID. In Go versions before 1.22, or when `go.mod` uses an older version, there is a loop variable capture issue. The code takes the address of the loop variable `_ref` instead of its value. As a result, if more than one reference matches the ID or if the loop logic is incorrect, the `ref` pointer will always end up pointing to the last element in the `SignedInfo...

Affected product and versions

Product
russellhaering goxmldsig, Multicluster Global Hub 1.3.4, Multicluster Global Hub 1.5.4
Affected versions
>= < 1.6.0, < 1.6.0
Fixed versions
1.6.0

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that russellhaering goxmldsig, Multicluster Global Hub 1.3.4, Multicluster Global Hub 1.5.4 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:H/A:N
CWE
CWE-347, CWE-682
CVE-2026-33487 — russellhaering goxmldsig, Multicluster Global Hub 1.3.4, Multicluster Global Hub 1.5.4 | SECUFOCUS NOW