CVE-2026-57438

Invalid memory access via freed XInclude wrappers

Published Jun 25, 2026 · Updated Jun 25, 2026

Use-after-free in Sparkle Motion Nokogiri before 1.19.4 allows attackers to trigger invalid memory reads or writes during XInclude processing. Node#do_xinclude replaces each xi:include in place, freeing exposed child nodes and namespaces while their live Ruby wrappers retain dangling pointers. Only CRuby is affected, and reachability requires parsing without XInclude, exposing an include-subtree object to Ruby, and then invoking do_xinclude; parse-time XInclude and JRuby are unaffected.

CVSS severity6.6
Medium
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Sparkle Motion Nokogiri before 1.19.4 allows attackers to trigger invalid memory reads or writes during XInclude processing. Node#do_xinclude replaces each xi:include in place, freeing exposed child nodes and namespaces while their live Ruby wrappers retain dangling pointers. Only CRuby is affected, and reachability requires parsing without XInclude, exposing an include-subtree object to Ruby, and then invoking do_xinclude; parse-time XInclude and JRuby are unaffected.

The record

CVE
CVE-2026-57438
Published
Jun 25, 2026
Updated
Jun 25, 2026
Vendor
Sparkle Motion
Product
Nokogiri
Classifications
CWE-416
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Jun 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.19.4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

Sparkle Motion · Nokogiriversion=< 1.19.4

Published CVSS scores

2.2GitHub, Inc.CVSS:4.0/AV:L/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/E:U
6.6NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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