Vulnerability in Sparklemotion Nokogiri
CVE-2026-79771
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 v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
Affected products
Weakness classification (CWE)
References
- disclosure@vulncheck.com (vendor-advisory)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2026-79771?
- CVE-2026-79771 is a medium-severity vulnerability in Sparklemotion Nokogiri, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 5.3/10. Published 2026-08-25.
- How severe is CVE-2026-79771?
- Medium severity. CVSS v3 base score is 5.3 out of 10.