{"cve":"CVE-2026-79771","nvd":{"published":"2026-08-25T16:17:28.603","modified":"2026-09-01T14:55:10.577","status":"Analyzed","description":"Nokogiri versions before 1.19.3 contain a memory leak in the XSLT Stylesheet transform method when processing Ruby strings containing null bytes. Attackers can exploit this by passing attacker-controlled input with null bytes to transform parameters, causing heap allocations to leak and enabling denial of service against long-running processes.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/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:N/A:L","score":5.3},"cwes":["CWE-401"],"references":["https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-v2fc-qm4h-8hqv","https://www.vulncheck.com/advisories/nokogiri-before-memory-leak-via-xslt-transform"],"products":["nokogiri:nokogiri"],"source":"nvd","synced_at":"2026-10-19T22:50:17.453294893+00:00"},"epss":{"cve":"CVE-2026-79771","score":0.00423,"percentile":0.3661,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-v2fc-qm4h-8hqv","url":"https://osv.dev/vulnerability/GHSA-v2fc-qm4h-8hqv","summary":"Nokogiri XSLT transform has a memory leak","modified":"2026-09-10T03:50:47.698230799Z","packages":[{"ecosystem":"RubyGems","name":"nokogiri","purl":"pkg:gem/nokogiri","ranges":["<1.19.3"],"fixed":["1.19.3"]}]}],"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."]}