CVE-2026-33487goxmlsig provides XML Digital Signatures implemented in Go.
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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
- 7.5 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- Weakness (CWE)
- CWE-347, CWE-682
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Modified
- Record last updated
- Sep 9, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
goxmldsig_project goxmldsig goxmldsig_project:goxmldsig | before 1.6.0 | NVD |
References
- https://github.com/russellhaering/goxmldsig/security/advisories/GHSA-479m-364c-43vcexploit, mitigation, vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:13548
- https://access.redhat.com/errata/RHSA-2026:20943
- https://access.redhat.com/errata/RHSA-2026:20946
- https://access.redhat.com/errata/RHSA-2026:21769
- https://access.redhat.com/errata/RHSA-2026:22347
- https://access.redhat.com/errata/RHSA-2026:22423
- https://access.redhat.com/errata/RHSA-2026:23345
- https://access.redhat.com/errata/RHSA-2026:36882
- https://access.redhat.com/security/cve/CVE-2026-33487
- https://bugzilla.redhat.com/show_bug.cgi?id=2451814
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33487.json
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.