CVE-2025-66578

See a problem?
Please try reporting it to the source first.
Source
https://nvd.nist.gov/vuln/detail/CVE-2025-66578
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-66578.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2025-66578
Aliases
Published
2025-12-09T02:41:19.621Z
Modified
2025-12-13T04:56:09.282785Z
Severity
  • 6.0 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:L CVSS Calculator
Summary
robrichards/xmlseclibs has an Libxml2 Canonicalization error which can bypass Digest/Signature validation
Details

xmlseclibs is a library written in PHP for working with XML Encryption and Signatures. Versions 3.1.3 contain an authentication bypass vulnerability due to a flaw in the libxml2 canonicalization process during document transformation. When libxml2’s canonicalization is invoked on an invalid XML input, it may return an empty string rather than a canonicalized node. xmlseclibs then proceeds to compute the DigestValue over this empty string, treating it as if canonicalization succeeded. This issue is fixed in version 3.1.4. Workarounds include treating canonicalization failures (exceptions or nil/empty outputs) as fatal and aborting validation, and/or adding explicit checks to reject when canonicalize returns nil/empty or raises errors.

Database specific 
{
    "cwe_ids": [
        "CWE-248"
    ],
    "cna_assigner": "GitHub_M",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/66xxx/CVE-2025-66578.json"
}
References

Affected packages

Git / github.com/robrichards/xmlseclibs

Affected ranges

Type
GIT
Repo
https://github.com/robrichards/xmlseclibs
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
bc87389224c6de95802b505e5265b0ec2c5bcdbd

Affected versions

1.*

1.3.2
1.4.0

2.*

2.0.0
2.0.1

3.*

3.0.0
3.0.1
3.0.2
3.0.3
3.0.4
3.1.0
3.1.1
3.1.2
3.1.3

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-66578.json"