RHSA-2026:22721
Vulnerability from csaf_redhat - Published: 2026-06-03 10:53 - Updated: 2026-06-16 21:50Summary
Red Hat Security Advisory: expat security update
Severity
Important
Notes
Topic: An update for expat is now available for Red Hat Enterprise Linux 8.
Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details: Expat is a C library for parsing XML documents.
Security Fix(es):
* libexpat: denial of service via crafted XML input (CVE-2026-45186)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
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 libexpat. When processing a specially crafted XML input containing a specific pattern of attributes, the parsing time increases quadratically due to checks for attribute name collisions. This consumes excessive CPU resources and eventually results in a denial of service.
7.5 (High)
Affected products
Fixed
21 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: BaseOS-8.10.0.Z.MAIN.EUS:expat-0:2.5.0-2.el8_10.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-8.10.0.Z.MAIN.EUS:expat-0:2.5.0-2.el8_10.i686 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-8.10.0.Z.MAIN.EUS:expat-0:2.5.0-2.el8_10.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-8.10.0.Z.MAIN.EUS:expat-0:2.5.0-2.el8_10.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-8.10.0.Z.MAIN.EUS:expat-0:2.5.0-2.el8_10.src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-8.10.0.Z.MAIN.EUS:expat-0:2.5.0-2.el8_10.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-8.10.0.Z.MAIN.EUS:expat-debuginfo-0:2.5.0-2.el8_10.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-8.10.0.Z.MAIN.EUS:expat-debuginfo-0:2.5.0-2.el8_10.i686 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-8.10.0.Z.MAIN.EUS:expat-debuginfo-0:2.5.0-2.el8_10.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-8.10.0.Z.MAIN.EUS:expat-debuginfo-0:2.5.0-2.el8_10.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-8.10.0.Z.MAIN.EUS:expat-debuginfo-0:2.5.0-2.el8_10.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-8.10.0.Z.MAIN.EUS:expat-debugsource-0:2.5.0-2.el8_10.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-8.10.0.Z.MAIN.EUS:expat-debugsource-0:2.5.0-2.el8_10.i686 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-8.10.0.Z.MAIN.EUS:expat-debugsource-0:2.5.0-2.el8_10.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-8.10.0.Z.MAIN.EUS:expat-debugsource-0:2.5.0-2.el8_10.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-8.10.0.Z.MAIN.EUS:expat-debugsource-0:2.5.0-2.el8_10.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-8.10.0.Z.MAIN.EUS:expat-devel-0:2.5.0-2.el8_10.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-8.10.0.Z.MAIN.EUS:expat-devel-0:2.5.0-2.el8_10.i686 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-8.10.0.Z.MAIN.EUS:expat-devel-0:2.5.0-2.el8_10.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-8.10.0.Z.MAIN.EUS:expat-devel-0:2.5.0-2.el8_10.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: BaseOS-8.10.0.Z.MAIN.EUS:expat-devel-0:2.5.0-2.el8_10.x86_64 | — |
Vendor Fix
fix
Workaround
|
Threats
Impact
Important
References
9 references
{
"document": {
"aggregate_severity": {
"namespace": "https://access.redhat.com/security/updates/classification/",
"text": "Important"
},
"category": "csaf_security_advisory",
"csaf_version": "2.0",
"distribution": {
"text": "Copyright \u00a9 Red Hat, Inc. All rights reserved.",
"tlp": {
"label": "WHITE",
"url": "https://www.first.org/tlp/"
}
},
"lang": "en",
"notes": [
{
"category": "summary",
"text": "An update for expat is now available for Red Hat Enterprise Linux 8.\n\nRed Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.",
"title": "Topic"
},
{
"category": "general",
"text": "Expat is a C library for parsing XML documents.\n\nSecurity Fix(es):\n\n* libexpat: denial of service via crafted XML input (CVE-2026-45186)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.",
"title": "Details"
},
{
"category": "legal_disclaimer",
"text": "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.",
"title": "Terms of Use"
}
],
"publisher": {
"category": "vendor",
"contact_details": "https://access.redhat.com/security/team/contact/",
"issuing_authority": "Red Hat Product Security is responsible for vulnerability handling across all Red Hat products and services.",
"name": "Red Hat Product Security",
"namespace": "https://www.redhat.com"
},
"references": [
{
"category": "self",
"summary": "https://access.redhat.com/errata/RHSA-2026:22721",
"url": "https://access.redhat.com/errata/RHSA-2026:22721"
},
{
"category": "external",
"summary": "https://access.redhat.com/security/updates/classification/#important",
"url": "https://access.redhat.com/security/updates/classification/#important"
},
{
"category": "external",
"summary": "2468575",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2468575"
},
{
"category": "self",
"summary": "Canonical URL",
"url": "https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_22721.json"
}
],
"title": "Red Hat Security Advisory: expat security update",
"tracking": {
"current_release_date": "2026-06-16T21:50:32+00:00",
"generator": {
"date": "2026-06-16T21:50:32+00:00",
"engine": {
"name": "Red Hat SDEngine",
"version": "5.0.0"
}
},
"id": "RHSA-2026:22721",
"initial_release_date": "2026-06-03T10:53:02+00:00",
"revision_history": [
{
"date": "2026-06-03T10:53:02+00:00",
"number": "1",
"summary": "Initial version"
},
{
"date": "2026-06-03T10:53:02+00:00",
"number": "2",
"summary": "Last updated version"
},
{
"date": "2026-06-16T21:50:32+00:00",
"number": "3",
"summary": "Last generated version"
}
],
"status": "final",
"version": "3"
}
},
"product_tree": {
"branches": [
{
"branches": [
{
"branches": [
{
"category": "product_name",
"name": "Red Hat Enterprise Linux BaseOS (v. 8)",
"product": {
"name": "Red Hat Enterprise Linux BaseOS (v. 8)",
"product_id": "BaseOS-8.10.0.Z.MAIN.EUS",
"product_identification_helper": {
"cpe": "cpe:/o:redhat:enterprise_linux:8::baseos"
}
}
}
],
"category": "product_family",
"name": "Red Hat Enterprise Linux"
},
{
"branches": [
{
"category": "product_version",
"name": "expat-0:2.5.0-2.el8_10.src",
"product": {
"name": "expat-0:2.5.0-2.el8_10.src",
"product_id": "expat-0:2.5.0-2.el8_10.src",
"product_identification_helper": {
"purl": "pkg:rpm/redhat/expat@2.5.0-2.el8_10?arch=src"
}
}
}
],
"category": "architecture",
"name": "src"
},
{
"branches": [
{
"category": "product_version",
"name": "expat-0:2.5.0-2.el8_10.aarch64",
"product": {
"name": "expat-0:2.5.0-2.el8_10.aarch64",
"product_id": "expat-0:2.5.0-2.el8_10.aarch64",
"product_identification_helper": {
"purl": "pkg:rpm/redhat/expat@2.5.0-2.el8_10?arch=aarch64"
}
}
},
{
"category": "product_version",
"name": "expat-devel-0:2.5.0-2.el8_10.aarch64",
"product": {
"name": "expat-devel-0:2.5.0-2.el8_10.aarch64",
"product_id": "expat-devel-0:2.5.0-2.el8_10.aarch64",
"product_identification_helper": {
"purl": "pkg:rpm/redhat/expat-devel@2.5.0-2.el8_10?arch=aarch64"
}
}
},
{
"category": "product_version",
"name": "expat-debugsource-0:2.5.0-2.el8_10.aarch64",
"product": {
"name": "expat-debugsource-0:2.5.0-2.el8_10.aarch64",
"product_id": "expat-debugsource-0:2.5.0-2.el8_10.aarch64",
"product_identification_helper": {
"purl": "pkg:rpm/redhat/expat-debugsource@2.5.0-2.el8_10?arch=aarch64"
}
}
},
{
"category": "product_version",
"name": "expat-debuginfo-0:2.5.0-2.el8_10.aarch64",
"product": {
"name": "expat-debuginfo-0:2.5.0-2.el8_10.aarch64",
"product_id": "expat-debuginfo-0:2.5.0-2.el8_10.aarch64",
"product_identification_helper": {
"purl": "pkg:rpm/redhat/expat-debuginfo@2.5.0-2.el8_10?arch=aarch64"
}
}
}
],
"category": "architecture",
"name": "aarch64"
},
{
"branches": [
{
"category": "product_version",
"name": "expat-0:2.5.0-2.el8_10.ppc64le",
"product": {
"name": "expat-0:2.5.0-2.el8_10.ppc64le",
"product_id": "expat-0:2.5.0-2.el8_10.ppc64le",
"product_identification_helper": {
"purl": "pkg:rpm/redhat/expat@2.5.0-2.el8_10?arch=ppc64le"
}
}
},
{
"category": "product_version",
"name": "expat-devel-0:2.5.0-2.el8_10.ppc64le",
"product": {
"name": "expat-devel-0:2.5.0-2.el8_10.ppc64le",
"product_id": "expat-devel-0:2.5.0-2.el8_10.ppc64le",
"product_identification_helper": {
"purl": "pkg:rpm/redhat/expat-devel@2.5.0-2.el8_10?arch=ppc64le"
}
}
},
{
"category": "product_version",
"name": "expat-debugsource-0:2.5.0-2.el8_10.ppc64le",
"product": {
"name": "expat-debugsource-0:2.5.0-2.el8_10.ppc64le",
"product_id": "expat-debugsource-0:2.5.0-2.el8_10.ppc64le",
"product_identification_helper": {
"purl": "pkg:rpm/redhat/expat-debugsource@2.5.0-2.el8_10?arch=ppc64le"
}
}
},
{
"category": "product_version",
"name": "expat-debuginfo-0:2.5.0-2.el8_10.ppc64le",
"product": {
"name": "expat-debuginfo-0:2.5.0-2.el8_10.ppc64le",
"product_id": "expat-debuginfo-0:2.5.0-2.el8_10.ppc64le",
"product_identification_helper": {
"purl": "pkg:rpm/redhat/expat-debuginfo@2.5.0-2.el8_10?arch=ppc64le"
}
}
}
],
"category": "architecture",
"name": "ppc64le"
},
{
"branches": [
{
"category": "product_version",
"name": "expat-0:2.5.0-2.el8_10.i686",
"product": {
"name": "expat-0:2.5.0-2.el8_10.i686",
"product_id": "expat-0:2.5.0-2.el8_10.i686",
"product_identification_helper": {
"purl": "pkg:rpm/redhat/expat@2.5.0-2.el8_10?arch=i686"
}
}
},
{
"category": "product_version",
"name": "expat-devel-0:2.5.0-2.el8_10.i686",
"product": {
"name": "expat-devel-0:2.5.0-2.el8_10.i686",
"product_id": "expat-devel-0:2.5.0-2.el8_10.i686",
"product_identification_helper": {
"purl": "pkg:rpm/redhat/expat-devel@2.5.0-2.el8_10?arch=i686"
}
}
},
{
"category": "product_version",
"name": "expat-debugsource-0:2.5.0-2.el8_10.i686",
"product": {
"name": "expat-debugsource-0:2.5.0-2.el8_10.i686",
"product_id": "expat-debugsource-0:2.5.0-2.el8_10.i686",
"product_identification_helper": {
"purl": "pkg:rpm/redhat/expat-debugsource@2.5.0-2.el8_10?arch=i686"
}
}
},
{
"category": "product_version",
"name": "expat-debuginfo-0:2.5.0-2.el8_10.i686",
"product": {
"name": "expat-debuginfo-0:2.5.0-2.el8_10.i686",
"product_id": "expat-debuginfo-0:2.5.0-2.el8_10.i686",
"product_identification_helper": {
"purl": "pkg:rpm/redhat/expat-debuginfo@2.5.0-2.el8_10?arch=i686"
}
}
}
],
"category": "architecture",
"name": "i686"
},
{
"branches": [
{
"category": "product_version",
"name": "expat-0:2.5.0-2.el8_10.x86_64",
"product": {
"name": "expat-0:2.5.0-2.el8_10.x86_64",
"product_id": "expat-0:2.5.0-2.el8_10.x86_64",
"product_identification_helper": {
"purl": "pkg:rpm/redhat/expat@2.5.0-2.el8_10?arch=x86_64"
}
}
},
{
"category": "product_version",
"name": "expat-devel-0:2.5.0-2.el8_10.x86_64",
"product": {
"name": "expat-devel-0:2.5.0-2.el8_10.x86_64",
"product_id": "expat-devel-0:2.5.0-2.el8_10.x86_64",
"product_identification_helper": {
"purl": "pkg:rpm/redhat/expat-devel@2.5.0-2.el8_10?arch=x86_64"
}
}
},
{
"category": "product_version",
"name": "expat-debugsource-0:2.5.0-2.el8_10.x86_64",
"product": {
"name": "expat-debugsource-0:2.5.0-2.el8_10.x86_64",
"product_id": "expat-debugsource-0:2.5.0-2.el8_10.x86_64",
"product_identification_helper": {
"purl": "pkg:rpm/redhat/expat-debugsource@2.5.0-2.el8_10?arch=x86_64"
}
}
},
{
"category": "product_version",
"name": "expat-debuginfo-0:2.5.0-2.el8_10.x86_64",
"product": {
"name": "expat-debuginfo-0:2.5.0-2.el8_10.x86_64",
"product_id": "expat-debuginfo-0:2.5.0-2.el8_10.x86_64",
"product_identification_helper": {
"purl": "pkg:rpm/redhat/expat-debuginfo@2.5.0-2.el8_10?arch=x86_64"
}
}
}
],
"category": "architecture",
"name": "x86_64"
},
{
"branches": [
{
"category": "product_version",
"name": "expat-0:2.5.0-2.el8_10.s390x",
"product": {
"name": "expat-0:2.5.0-2.el8_10.s390x",
"product_id": "expat-0:2.5.0-2.el8_10.s390x",
"product_identification_helper": {
"purl": "pkg:rpm/redhat/expat@2.5.0-2.el8_10?arch=s390x"
}
}
},
{
"category": "product_version",
"name": "expat-devel-0:2.5.0-2.el8_10.s390x",
"product": {
"name": "expat-devel-0:2.5.0-2.el8_10.s390x",
"product_id": "expat-devel-0:2.5.0-2.el8_10.s390x",
"product_identification_helper": {
"purl": "pkg:rpm/redhat/expat-devel@2.5.0-2.el8_10?arch=s390x"
}
}
},
{
"category": "product_version",
"name": "expat-debugsource-0:2.5.0-2.el8_10.s390x",
"product": {
"name": "expat-debugsource-0:2.5.0-2.el8_10.s390x",
"product_id": "expat-debugsource-0:2.5.0-2.el8_10.s390x",
"product_identification_helper": {
"purl": "pkg:rpm/redhat/expat-debugsource@2.5.0-2.el8_10?arch=s390x"
}
}
},
{
"category": "product_version",
"name": "expat-debuginfo-0:2.5.0-2.el8_10.s390x",
"product": {
"name": "expat-debuginfo-0:2.5.0-2.el8_10.s390x",
"product_id": "expat-debuginfo-0:2.5.0-2.el8_10.s390x",
"product_identification_helper": {
"purl": "pkg:rpm/redhat/expat-debuginfo@2.5.0-2.el8_10?arch=s390x"
}
}
}
],
"category": "architecture",
"name": "s390x"
}
],
"category": "vendor",
"name": "Red Hat"
}
],
"relationships": [
{
"category": "default_component_of",
"full_product_name": {
"name": "expat-0:2.5.0-2.el8_10.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)",
"product_id": "BaseOS-8.10.0.Z.MAIN.EUS:expat-0:2.5.0-2.el8_10.aarch64"
},
"product_reference": "expat-0:2.5.0-2.el8_10.aarch64",
"relates_to_product_reference": "BaseOS-8.10.0.Z.MAIN.EUS"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "expat-0:2.5.0-2.el8_10.i686 as a component of Red Hat Enterprise Linux BaseOS (v. 8)",
"product_id": "BaseOS-8.10.0.Z.MAIN.EUS:expat-0:2.5.0-2.el8_10.i686"
},
"product_reference": "expat-0:2.5.0-2.el8_10.i686",
"relates_to_product_reference": "BaseOS-8.10.0.Z.MAIN.EUS"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "expat-0:2.5.0-2.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)",
"product_id": "BaseOS-8.10.0.Z.MAIN.EUS:expat-0:2.5.0-2.el8_10.ppc64le"
},
"product_reference": "expat-0:2.5.0-2.el8_10.ppc64le",
"relates_to_product_reference": "BaseOS-8.10.0.Z.MAIN.EUS"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "expat-0:2.5.0-2.el8_10.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 8)",
"product_id": "BaseOS-8.10.0.Z.MAIN.EUS:expat-0:2.5.0-2.el8_10.s390x"
},
"product_reference": "expat-0:2.5.0-2.el8_10.s390x",
"relates_to_product_reference": "BaseOS-8.10.0.Z.MAIN.EUS"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "expat-0:2.5.0-2.el8_10.src as a component of Red Hat Enterprise Linux BaseOS (v. 8)",
"product_id": "BaseOS-8.10.0.Z.MAIN.EUS:expat-0:2.5.0-2.el8_10.src"
},
"product_reference": "expat-0:2.5.0-2.el8_10.src",
"relates_to_product_reference": "BaseOS-8.10.0.Z.MAIN.EUS"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "expat-0:2.5.0-2.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)",
"product_id": "BaseOS-8.10.0.Z.MAIN.EUS:expat-0:2.5.0-2.el8_10.x86_64"
},
"product_reference": "expat-0:2.5.0-2.el8_10.x86_64",
"relates_to_product_reference": "BaseOS-8.10.0.Z.MAIN.EUS"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "expat-debuginfo-0:2.5.0-2.el8_10.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)",
"product_id": "BaseOS-8.10.0.Z.MAIN.EUS:expat-debuginfo-0:2.5.0-2.el8_10.aarch64"
},
"product_reference": "expat-debuginfo-0:2.5.0-2.el8_10.aarch64",
"relates_to_product_reference": "BaseOS-8.10.0.Z.MAIN.EUS"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "expat-debuginfo-0:2.5.0-2.el8_10.i686 as a component of Red Hat Enterprise Linux BaseOS (v. 8)",
"product_id": "BaseOS-8.10.0.Z.MAIN.EUS:expat-debuginfo-0:2.5.0-2.el8_10.i686"
},
"product_reference": "expat-debuginfo-0:2.5.0-2.el8_10.i686",
"relates_to_product_reference": "BaseOS-8.10.0.Z.MAIN.EUS"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "expat-debuginfo-0:2.5.0-2.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)",
"product_id": "BaseOS-8.10.0.Z.MAIN.EUS:expat-debuginfo-0:2.5.0-2.el8_10.ppc64le"
},
"product_reference": "expat-debuginfo-0:2.5.0-2.el8_10.ppc64le",
"relates_to_product_reference": "BaseOS-8.10.0.Z.MAIN.EUS"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "expat-debuginfo-0:2.5.0-2.el8_10.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 8)",
"product_id": "BaseOS-8.10.0.Z.MAIN.EUS:expat-debuginfo-0:2.5.0-2.el8_10.s390x"
},
"product_reference": "expat-debuginfo-0:2.5.0-2.el8_10.s390x",
"relates_to_product_reference": "BaseOS-8.10.0.Z.MAIN.EUS"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "expat-debuginfo-0:2.5.0-2.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)",
"product_id": "BaseOS-8.10.0.Z.MAIN.EUS:expat-debuginfo-0:2.5.0-2.el8_10.x86_64"
},
"product_reference": "expat-debuginfo-0:2.5.0-2.el8_10.x86_64",
"relates_to_product_reference": "BaseOS-8.10.0.Z.MAIN.EUS"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "expat-debugsource-0:2.5.0-2.el8_10.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)",
"product_id": "BaseOS-8.10.0.Z.MAIN.EUS:expat-debugsource-0:2.5.0-2.el8_10.aarch64"
},
"product_reference": "expat-debugsource-0:2.5.0-2.el8_10.aarch64",
"relates_to_product_reference": "BaseOS-8.10.0.Z.MAIN.EUS"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "expat-debugsource-0:2.5.0-2.el8_10.i686 as a component of Red Hat Enterprise Linux BaseOS (v. 8)",
"product_id": "BaseOS-8.10.0.Z.MAIN.EUS:expat-debugsource-0:2.5.0-2.el8_10.i686"
},
"product_reference": "expat-debugsource-0:2.5.0-2.el8_10.i686",
"relates_to_product_reference": "BaseOS-8.10.0.Z.MAIN.EUS"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "expat-debugsource-0:2.5.0-2.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)",
"product_id": "BaseOS-8.10.0.Z.MAIN.EUS:expat-debugsource-0:2.5.0-2.el8_10.ppc64le"
},
"product_reference": "expat-debugsource-0:2.5.0-2.el8_10.ppc64le",
"relates_to_product_reference": "BaseOS-8.10.0.Z.MAIN.EUS"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "expat-debugsource-0:2.5.0-2.el8_10.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 8)",
"product_id": "BaseOS-8.10.0.Z.MAIN.EUS:expat-debugsource-0:2.5.0-2.el8_10.s390x"
},
"product_reference": "expat-debugsource-0:2.5.0-2.el8_10.s390x",
"relates_to_product_reference": "BaseOS-8.10.0.Z.MAIN.EUS"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "expat-debugsource-0:2.5.0-2.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)",
"product_id": "BaseOS-8.10.0.Z.MAIN.EUS:expat-debugsource-0:2.5.0-2.el8_10.x86_64"
},
"product_reference": "expat-debugsource-0:2.5.0-2.el8_10.x86_64",
"relates_to_product_reference": "BaseOS-8.10.0.Z.MAIN.EUS"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "expat-devel-0:2.5.0-2.el8_10.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)",
"product_id": "BaseOS-8.10.0.Z.MAIN.EUS:expat-devel-0:2.5.0-2.el8_10.aarch64"
},
"product_reference": "expat-devel-0:2.5.0-2.el8_10.aarch64",
"relates_to_product_reference": "BaseOS-8.10.0.Z.MAIN.EUS"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "expat-devel-0:2.5.0-2.el8_10.i686 as a component of Red Hat Enterprise Linux BaseOS (v. 8)",
"product_id": "BaseOS-8.10.0.Z.MAIN.EUS:expat-devel-0:2.5.0-2.el8_10.i686"
},
"product_reference": "expat-devel-0:2.5.0-2.el8_10.i686",
"relates_to_product_reference": "BaseOS-8.10.0.Z.MAIN.EUS"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "expat-devel-0:2.5.0-2.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)",
"product_id": "BaseOS-8.10.0.Z.MAIN.EUS:expat-devel-0:2.5.0-2.el8_10.ppc64le"
},
"product_reference": "expat-devel-0:2.5.0-2.el8_10.ppc64le",
"relates_to_product_reference": "BaseOS-8.10.0.Z.MAIN.EUS"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "expat-devel-0:2.5.0-2.el8_10.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 8)",
"product_id": "BaseOS-8.10.0.Z.MAIN.EUS:expat-devel-0:2.5.0-2.el8_10.s390x"
},
"product_reference": "expat-devel-0:2.5.0-2.el8_10.s390x",
"relates_to_product_reference": "BaseOS-8.10.0.Z.MAIN.EUS"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "expat-devel-0:2.5.0-2.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)",
"product_id": "BaseOS-8.10.0.Z.MAIN.EUS:expat-devel-0:2.5.0-2.el8_10.x86_64"
},
"product_reference": "expat-devel-0:2.5.0-2.el8_10.x86_64",
"relates_to_product_reference": "BaseOS-8.10.0.Z.MAIN.EUS"
}
]
},
"vulnerabilities": [
{
"cve": "CVE-2026-45186",
"cwe": {
"id": "CWE-407",
"name": "Inefficient Algorithmic Complexity"
},
"discovery_date": "2026-05-10T07:00:47.768180+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2468575"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in libexpat. When processing a specially crafted XML input containing a specific pattern of attributes, the parsing time increases quadratically due to checks for attribute name collisions. This consumes excessive CPU resources and eventually results in a denial of service.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "libexpat: denial of service via crafted XML input",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "To exploit this issue, an attacker needs to be able to process a specially crafted XML file or input with an application linked to the libexpat library. Also, the only security impact of this flaw is a high consumption of CPU resources that can eventually cause a denial of service. Due to this reason, this vulnerability has been rated with an important severity.",
"title": "Statement"
},
{
"category": "general",
"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.",
"title": "CVSS score applicability"
}
],
"product_status": {
"fixed": [
"BaseOS-8.10.0.Z.MAIN.EUS:expat-0:2.5.0-2.el8_10.aarch64",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-0:2.5.0-2.el8_10.i686",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-0:2.5.0-2.el8_10.ppc64le",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-0:2.5.0-2.el8_10.s390x",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-0:2.5.0-2.el8_10.src",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-0:2.5.0-2.el8_10.x86_64",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-debuginfo-0:2.5.0-2.el8_10.aarch64",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-debuginfo-0:2.5.0-2.el8_10.i686",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-debuginfo-0:2.5.0-2.el8_10.ppc64le",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-debuginfo-0:2.5.0-2.el8_10.s390x",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-debuginfo-0:2.5.0-2.el8_10.x86_64",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-debugsource-0:2.5.0-2.el8_10.aarch64",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-debugsource-0:2.5.0-2.el8_10.i686",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-debugsource-0:2.5.0-2.el8_10.ppc64le",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-debugsource-0:2.5.0-2.el8_10.s390x",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-debugsource-0:2.5.0-2.el8_10.x86_64",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-devel-0:2.5.0-2.el8_10.aarch64",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-devel-0:2.5.0-2.el8_10.i686",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-devel-0:2.5.0-2.el8_10.ppc64le",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-devel-0:2.5.0-2.el8_10.s390x",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-devel-0:2.5.0-2.el8_10.x86_64"
]
},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-45186"
},
{
"category": "external",
"summary": "RHBZ#2468575",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2468575"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-45186",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-45186"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-45186",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-45186"
},
{
"category": "external",
"summary": "https://github.com/libexpat/libexpat/pull/1216",
"url": "https://github.com/libexpat/libexpat/pull/1216"
}
],
"release_date": "2026-05-10T06:36:16.927000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-06-03T10:53:02+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
"product_ids": [
"BaseOS-8.10.0.Z.MAIN.EUS:expat-0:2.5.0-2.el8_10.aarch64",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-0:2.5.0-2.el8_10.i686",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-0:2.5.0-2.el8_10.ppc64le",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-0:2.5.0-2.el8_10.s390x",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-0:2.5.0-2.el8_10.src",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-0:2.5.0-2.el8_10.x86_64",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-debuginfo-0:2.5.0-2.el8_10.aarch64",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-debuginfo-0:2.5.0-2.el8_10.i686",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-debuginfo-0:2.5.0-2.el8_10.ppc64le",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-debuginfo-0:2.5.0-2.el8_10.s390x",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-debuginfo-0:2.5.0-2.el8_10.x86_64",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-debugsource-0:2.5.0-2.el8_10.aarch64",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-debugsource-0:2.5.0-2.el8_10.i686",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-debugsource-0:2.5.0-2.el8_10.ppc64le",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-debugsource-0:2.5.0-2.el8_10.s390x",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-debugsource-0:2.5.0-2.el8_10.x86_64",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-devel-0:2.5.0-2.el8_10.aarch64",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-devel-0:2.5.0-2.el8_10.i686",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-devel-0:2.5.0-2.el8_10.ppc64le",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-devel-0:2.5.0-2.el8_10.s390x",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-devel-0:2.5.0-2.el8_10.x86_64"
],
"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2026:22721"
},
{
"category": "workaround",
"details": "To mitigate this vulnerability, restrict the maximum size of incoming XML payloads. It is especially critical to limit the decompressed size if the application accepts compressed XML files. Also, consider running the application inside a container or a restricted environment to ensure that the high consumption of CPU resources does not affect the host system.",
"product_ids": [
"BaseOS-8.10.0.Z.MAIN.EUS:expat-0:2.5.0-2.el8_10.aarch64",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-0:2.5.0-2.el8_10.i686",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-0:2.5.0-2.el8_10.ppc64le",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-0:2.5.0-2.el8_10.s390x",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-0:2.5.0-2.el8_10.src",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-0:2.5.0-2.el8_10.x86_64",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-debuginfo-0:2.5.0-2.el8_10.aarch64",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-debuginfo-0:2.5.0-2.el8_10.i686",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-debuginfo-0:2.5.0-2.el8_10.ppc64le",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-debuginfo-0:2.5.0-2.el8_10.s390x",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-debuginfo-0:2.5.0-2.el8_10.x86_64",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-debugsource-0:2.5.0-2.el8_10.aarch64",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-debugsource-0:2.5.0-2.el8_10.i686",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-debugsource-0:2.5.0-2.el8_10.ppc64le",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-debugsource-0:2.5.0-2.el8_10.s390x",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-debugsource-0:2.5.0-2.el8_10.x86_64",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-devel-0:2.5.0-2.el8_10.aarch64",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-devel-0:2.5.0-2.el8_10.i686",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-devel-0:2.5.0-2.el8_10.ppc64le",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-devel-0:2.5.0-2.el8_10.s390x",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-devel-0:2.5.0-2.el8_10.x86_64"
]
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"products": [
"BaseOS-8.10.0.Z.MAIN.EUS:expat-0:2.5.0-2.el8_10.aarch64",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-0:2.5.0-2.el8_10.i686",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-0:2.5.0-2.el8_10.ppc64le",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-0:2.5.0-2.el8_10.s390x",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-0:2.5.0-2.el8_10.src",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-0:2.5.0-2.el8_10.x86_64",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-debuginfo-0:2.5.0-2.el8_10.aarch64",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-debuginfo-0:2.5.0-2.el8_10.i686",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-debuginfo-0:2.5.0-2.el8_10.ppc64le",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-debuginfo-0:2.5.0-2.el8_10.s390x",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-debuginfo-0:2.5.0-2.el8_10.x86_64",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-debugsource-0:2.5.0-2.el8_10.aarch64",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-debugsource-0:2.5.0-2.el8_10.i686",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-debugsource-0:2.5.0-2.el8_10.ppc64le",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-debugsource-0:2.5.0-2.el8_10.s390x",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-debugsource-0:2.5.0-2.el8_10.x86_64",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-devel-0:2.5.0-2.el8_10.aarch64",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-devel-0:2.5.0-2.el8_10.i686",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-devel-0:2.5.0-2.el8_10.ppc64le",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-devel-0:2.5.0-2.el8_10.s390x",
"BaseOS-8.10.0.Z.MAIN.EUS:expat-devel-0:2.5.0-2.el8_10.x86_64"
]
}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "libexpat: denial of service via crafted XML input"
}
]
}
Loading…
Loading…
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.
Loading…
Loading…