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.
Published: 2026-08-25
Score: 6.9 Medium
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

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Tracking

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Advisories

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History

Tue, 25 Aug 2026 15:30:00 +0000

Type Values Removed Values Added
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.
Title Nokogiri before 1.19.3 Memory Leak via XSLT Transform
First Time appeared Nokogiri
Nokogiri nokogiri
Weaknesses CWE-401
CPEs cpe:2.3:a:nokogiri:nokogiri:*:*:*:*:*:*:*:*
Vendors & Products Nokogiri
Nokogiri nokogiri
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'}

cvssV4_0

{'score': 6.9, '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'}

Subscriptions

Nokogiri Nokogiri
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-08-25T15:16:03.736Z

Reserved: 2026-08-25T14:29:43.528Z

Link: CVE-2026-79771

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-08-25T16:17:28.603

Modified: 2026-08-25T16:17:28.603

Link: CVE-2026-79771

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses
  • CWE-401

    Missing Release of Memory after Effective Lifetime