Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Goxmldsig Project | Goxmldsig | < 1.6.0 |
Related Weaknesses (CWE)
References
- https://github.com/russellhaering/goxmldsig/security/advisories/GHSA-479m-364c-4ExploitMitigationVendor Advisory
FAQ
What is CVE-2026-33487?
CVE-2026-33487 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 ...
How severe is CVE-2026-33487?
CVE-2026-33487 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-33487?
Check the references section above for vendor advisories and patch information. Affected products include: Goxmldsig Project Goxmldsig.