sparklemotion Nokogiri up to 1.19.0 canonicalize return value

Summaryinfo

A vulnerability, which was classified as problematic, was found in sparklemotion Nokogiri up to 1.19.0. Affected by this issue is the function canonicalize. Executing a manipulation can lead to return value. This vulnerability is registered as CVE-2026-79772. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability classified as problematic was found in sparklemotion Nokogiri up to 1.19.0. This vulnerability affects the function canonicalize. The manipulation with an unknown input leads to a return value vulnerability. The CWE definition for the vulnerability is CWE-252. The product does not check the return value from a method or function, which can prevent it from detecting unexpected states and conditions. As an impact it is known to affect integrity. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability was named CVE-2026-79772 since 08/25/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit.

Upgrading to version 1.19.1 eliminates this vulnerability.

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Productinfo

Vendor

• sparklemotion

Name

• Nokogiri

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 1.9
• 1.10
• 1.11
• 1.12
• 1.13
• 1.14
• 1.15
• 1.16
• 1.17
• 1.18
• 1.19.0

Website

• Product: https://github.com/sparklemotion/nokogiri/

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