goxmldsig has validateSignature Loop Variable Capture Signature Bypass_CVE-2026-33487

7.5 / 10

HIGH

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

Description

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.References` slice after the loop. goxmlsig version 1.6.0 contains a patch.

Basic Information

ID CVE-2026-33487

Source GitHub_M

Published Mar 26, 2026 at 17:17

Modified Mar 30, 2026 at 11:16

Affected Product

Vendor russellhaering

Product goxmldsig

Version < 1.6.0

Affected Versions russellhaering goxmldsig < 1.6.0

CWE Classification

CWE-347 CWE-682

References

github.com /russellhaering/goxmldsig/security/advisories/GHSA-479m-364c-43vc

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    "published": "2026-03-26T17:17:51.101Z",
    "modified": "2026-03-30T11:16:34.970Z",
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    "title": "goxmldsig has validateSignature Loop Variable Capture Signature Bypass",
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