# CVE-2026-79771

## Summary

- **CVE ID:** CVE-2026-79771
- **Severity:** MEDIUM
- **CVSS Score:** 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)
- **CWE:** CWE-401
- **Published:** Aug 25, 2026
- **Last Modified:** Aug 25, 2026

## 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.

## Affected Products

- sparklemotion — nokogiri (0)
- sparklemotion — nokogiri (1.19.3)

## References

- [CNA](https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-v2fc-qm4h-8hqv)
- [CNA](https://www.vulncheck.com/advisories/nokogiri-before-memory-leak-via-xslt-transform)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.30%
- **EPSS Percentile:** 22.9

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._