CVE-2026-79772: Unchecked Return Value in sparklemotion nokogiri
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.
CVE-2026-79772: Unchecked Return Value in sparklemotion nokogiri
Description
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 v4.0
Score 6.9medium
Affected software
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-08-25T14:29:43.528Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a8dba55acd9273b4965b686
Added to database: 08/25/2026, 15:52:53 UTC
Last updated: 08/25/2026, 17:45:37 UTC
Views: 5
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