RHSA-2026:41276
Vulnerability from csaf_redhat - Published: 2026-07-17 20:00 - Updated: 2026-09-08 22:42Summary
Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update
Severity
Important
Notes
Topic: An update for Red Hat Hardened Images RPMs is now available.
Details: This update includes the following RPMs:
libxslt:
* libxslt-1.1.45-0.1.1.hum1 (aarch64, x86_64)
* libxslt-devel-1.1.45-0.1.1.hum1 (aarch64, x86_64)
* python3-libxslt-1.1.45-0.1.1.hum1 (aarch64, x86_64)
* libxslt-1.1.45-0.1.1.hum1.src (src)
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
A flaw was found in Nokogiri, which bundles a vulnerable version of libxslt. This vulnerability involves a use-after-free condition that can be triggered by processing specially crafted Extensible Stylesheet Language Transformations (XSLT). A remote attacker could exploit this to cause memory corruption, potentially leading to a denial of service or other impacts.
7.8 (High)
Affected products
Fixed
3 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: Red Hat Hardened Images:libxslt-main@aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:libxslt-main@src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:libxslt-main@x86_64 | — |
Vendor Fix
fix
Workaround
|
Threats
Impact
Important
References
11 references
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"vulnerabilities": [
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"cve": "CVE-2025-71406",
"cwe": {
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"name": "Expired Pointer Dereference"
},
"discovery_date": "2026-08-25T15:35:09.383123+00:00",
"ids": [
{
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"text": "2523577"
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"notes": [
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"category": "description",
"text": "A flaw was found in Nokogiri, which bundles a vulnerable version of libxslt. This vulnerability involves a use-after-free condition that can be triggered by processing specially crafted Extensible Stylesheet Language Transformations (XSLT). A remote attacker could exploit this to cause memory corruption, potentially leading to a denial of service or other impacts.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "nokogiri: libxslt: Nokogiri: Memory corruption via crafted XSLT",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This is an Important vulnerability. Red Hat products bundling Nokogiri versions prior to 1.18.4 are affected by use-after-free flaws in the integrated libxslt library. Processing specially crafted XSLT input could lead to memory corruption, potentially allowing for remote code execution or denial of service in applications that handle untrusted XSLT.",
"title": "Statement"
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"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-71406"
},
{
"category": "external",
"summary": "https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-mrxw-mxhj-p664",
"url": "https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-mrxw-mxhj-p664"
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{
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"summary": "https://www.vulncheck.com/advisories/nokogiri-before-use-after-free-via-libxslt",
"url": "https://www.vulncheck.com/advisories/nokogiri-before-use-after-free-via-libxslt"
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],
"release_date": "2026-08-25T15:15:58.585000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-07-17T20:00:11+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\nhttps://images.redhat.com/",
"product_ids": [
"Red Hat Hardened Images:libxslt-main@aarch64",
"Red Hat Hardened Images:libxslt-main@src",
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{
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"details": "To reduce the risk associated with this vulnerability, ensure that applications using Nokogiri do not process untrusted Extensible Stylesheet Language Transformations (XSLT) input. Implement strict input validation and only allow XSLT from trusted sources.",
"product_ids": [
"Red Hat Hardened Images:libxslt-main@aarch64",
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"scores": [
{
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"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:H",
"version": "3.1"
},
"products": [
"Red Hat Hardened Images:libxslt-main@aarch64",
"Red Hat Hardened Images:libxslt-main@src",
"Red Hat Hardened Images:libxslt-main@x86_64"
]
}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "nokogiri: libxslt: Nokogiri: Memory corruption via crafted XSLT"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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