{"cve":"CVE-2026-79772","nvd":{"published":"2026-08-25T16:17:28.743","modified":"2026-09-01T14:54:24.567","status":"Analyzed","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":{"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","score":6.9},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","score":5.3},"cwes":["CWE-252"],"references":["https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-wx95-c6cv-8532","https://www.vulncheck.com/advisories/nokogiri-before-unchecked-return-value-canonicalize"],"products":["nokogiri:nokogiri"],"source":"nvd","synced_at":"2026-10-19T22:50:17.453294893+00:00"},"epss":{"cve":"CVE-2026-79772","score":0.00342,"percentile":0.27704,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-wx95-c6cv-8532","url":"https://osv.dev/vulnerability/GHSA-wx95-c6cv-8532","summary":"Nokogiri does not check the return value from xmlC14NExecute","modified":"2026-09-10T03:50:36.054145185Z","packages":[{"ecosystem":"RubyGems","name":"nokogiri","purl":"pkg:gem/nokogiri","ranges":[">=1.5.1 <1.19.1"],"fixed":["1.19.1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}