CVE-2026-79772

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.

CVSS v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-wx95-c6cv-8532	Vendor Advisory
https://www.vulncheck.com/advisories/nokogiri-before-unchecked-return-value-canonicalize	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:nokogiri:nokogiri:*:*:*:*:*:ruby:*:*

History

No history.

Information

Published : 2026-08-25 16:17

Updated : 2026-09-01 14:54

NVD link : CVE-2026-79772

Mitre link : CVE-2026-79772

CVE.ORG link : CVE-2026-79772

JSON object : View

Products Affected

nokogiri

nokogiri

CWE

CWE-252

Unchecked Return Value

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