VULNERABILITY INTELLIGENCE

CVE-2026-79769

CVSS score5.5 MEDIUM
EPSS probability0.31%
CISA KEVNot currently listed
Published2026-08-25
Last modified2026-09-24
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Description

Nokogiri versions before 1.19.4 contain a possible invalid (out-of-bounds) memory read in the protected internal Node#initialize_copy_with_args helper behind Node#dup and #clone, which unwrapped its source argument as an xmlNode without a type check. If application code calls this protected method with a non-Node argument (e.g., a Namespace), it reads an xmlNs out of bounds, crashing the process. This is only triggerable by a programming error and cannot be triggered by untrusted input or normal use of the public API. Only CRuby is affected. Version 1.19.4 adds a type check and raises TypeError.

Weakness classification

  • disclosure@vulncheck.com: CWE-843

Primary references