CVE-2026-79771CWE-401

CVE-2026-79771

Medium · published August 25, 2026

CVSS v3.1
5.3
EPSS
0%
Percentile
35.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CVSS v4.0
6.9 · 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
EPSS
0.00423 · 35.5th percentile
Weakness
CWE-401 · Missing Release of Memory after Effective Lifetime
Published
2026-08-25T20:17Z
Affected products (1)
ProductVersionsFixed in
nokogiri/nokogiri< 1.19.31.19.3
References (2)
https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-v2fc-qm4h-8hqv · [email protected]https://www.vulncheck.com/advisories/nokogiri-before-memory-leak-via-xslt-transform · [email protected]
EPSS history
Timeline
  • 27 AUG 06:46Z
    EPSS moved — → 0%
    epss
  • 25 AUG 15:16Z
    Nokogiri before 1.19.3 Memory Leak via XSLT Transform
    cvelistv5