goxmldsig has validateSignature Loop Variable Capture Signature Bypass

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Summary

CVECVE-2026-33487
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-03-26 18:16:30 UTC
Updated2026-06-30 03:18:40 UTC
Descriptiongoxmlsig 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.References` slice after the loop. goxmlsig version 1.6.0 contains a patch.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from ADP

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS: 0.002990000 probability, percentile 0.215810000 (date 2026-07-02)

Problem Types: CWE-347 | CWE-682 | CWE-347 CWE-347: Improper Verification of Cryptographic Signature | CWE-682 CWE-682: Incorrect Calculation | CWE-347 Improper Verification of Cryptographic Signature

VersionSourceTypeScoreSeverityVector
3.1ADPCVSS7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
3.1[email protected]Secondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
3.10b0ca135-0b70-47e7-9f44-1890c2a1c46cSecondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
3.1CNADECLARED7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Goxmldsig Project Goxmldsig All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Russellhaering Goxmldsig affected < 1.6.0 Not specified
ADP Red Hat Multicluster Global Hub 1.3.4 Not specified Not specified
ADP Red Hat Multicluster Global Hub 1.4.5 Not specified Not specified
ADP Red Hat Multicluster Global Hub 1.5.4 Not specified Not specified
ADP Red Hat Multicluster Global Hub 1.6.2 Not specified Not specified
ADP Red Hat Red Hat Advanced Cluster Management For Kubernetes 2.15 Not specified Not specified
ADP Red Hat Red Hat OpenShift GitOps 1.18 Not specified Not specified
ADP Red Hat Red Hat OpenShift GitOps 1.19 Not specified Not specified
ADP Red Hat Red Hat Advanced Cluster Security 4 Not specified Not specified
ADP Red Hat Red Hat Enterprise Linux 10 Not specified Not specified
ADP Red Hat Red Hat Enterprise Linux 8 Not specified Not specified
ADP Red Hat Red Hat Enterprise Linux 9 Not specified Not specified

References

ReferenceSourceLinkTags
bugzilla.redhat.com/show_bug.cgi 0b0ca135-0b70-47e7-9f44-1890c2a1c46c bugzilla.redhat.com
access.redhat.com/errata/RHSA-2026:21769 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:20943 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:20946 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:23345 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
github.com/russellhaering/goxmldsig/security/advisories/GHSA-479m-364c-43vc [email protected] github.com Exploit, Mitigation, Vendor Advisory
access.redhat.com/errata/RHSA-2026:13548 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:22347 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33487.json 0b0ca135-0b70-47e7-9f44-1890c2a1c46c security.access.redhat.com
access.redhat.com/security/cve/CVE-2026-33487 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:22423 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Additional Advisory Data

SourceTimeEvent
ADP2026-03-26T18:02:32.278ZReported to Red Hat.
ADP2026-03-26T17:17:51.101ZMade public.

Solutions

ADP: RHSA-2026:22423: Multicluster Global Hub 1.3.4

ADP: RHSA-2026:22347: Multicluster Global Hub 1.4.5

ADP: RHSA-2026:21769: Multicluster Global Hub 1.5.4

ADP: RHSA-2026:23345: Multicluster Global Hub 1.6.2

ADP: RHSA-2026:13548: Red Hat Advanced Cluster Management for Kubernetes 2.15

ADP: RHSA-2026:20946: Red Hat OpenShift GitOps 1.18

ADP: RHSA-2026:20943: Red Hat OpenShift GitOps 1.19

Workarounds

ADP: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

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