CVE-2026-79772
Nokogiri before 1.19.1 Unchecked Return Value canonicalize
CVSS Score
5.3
EPSS Score
0.0%
EPSS Percentile
0th
Nokogiri versions before 1.19.1 fail to check the return value from xmlC14NExecute in the canonicalize method, returning an empty string on failure instead of raising an exception. Attackers can exploit this to bypass signature validation in downstream SAML libraries by providing invalid canonicalized XML that is incorrectly accepted as valid.
| CWE | CWE-252 |
| Vendor | sparklemotion |
| Product | nokogiri |
| Published | Aug 25, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None
Affected Versions
sparklemotion / nokogiri
1.5.1 < 1.19.1