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CVE-2026-41080 (GCVE-0-2026-41080)
Vulnerability from cvelistv5 – Published: 2026-04-16 16:52 – Updated: 2026-05-18 20:22
VLAI
EPSS
Summary
libexpat before 2.8.0 uses insufficient entropy, and thus hash flooding can occur via a crafted XML document.
Severity
CWE
- CWE-331 - Insufficient Entropy
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| libexpat project | libexpat |
Affected:
0 , < 2.8.0
(semver)
|
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FKIE_CVE-2026-41080
Vulnerability from fkie_nvd - Published: 2026-04-16 17:16 - Updated: 2026-04-27 07:16
Severity
2.9 (Low) - CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Summary
libexpat before 2.8.0 uses insufficient entropy, and thus hash flooding can occur via a crafted XML document.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| libexpat_project | libexpat | * |
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GHSA-FPQV-CR66-H6PC
Vulnerability from github – Published: 2026-04-16 18:31 – Updated: 2026-04-27 09:34
VLAI
Details
libexpat before 2.7.6 uses insufficient entropy, and thus hash flooding can occur via a crafted XML document.
Severity
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MSRC_CVE-2026-41080
Vulnerability from csaf_microsoft - Published: 2026-04-02 00:00 - Updated: 2026-05-19 01:39Summary
libexpat before 2.8.0 uses insufficient entropy, and thus hash flooding can occur via a crafted XML document.
Notes
Additional Resources: To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle
Disclaimer: The information provided in the Microsoft Knowledge Base is provided \"as is\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.
CWE-331
- Insufficient Entropy
Affected products
Known affected
4 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: 17086-6 | — |
None Available
|
|
| Unresolved product id: 17084-2 | — |
None Available
|
|
| Unresolved product id: 17084-1 | — |
None Available
|
|
| Unresolved product id: 17086-7 | — |
None Available
|
Known not affected
3 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: 17084-4 | — | ||
| Unresolved product id: 17084-5 | — | ||
| Unresolved product id: 17086-3 | — |
References
4 references
| URL | Category |
|---|---|
| https://msrc.microsoft.com/csaf/vex/2026/msrc_cve… | self |
| https://support.microsoft.com/lifecycle | external |
| https://www.first.org/cvss | external |
| https://msrc.microsoft.com/csaf/vex/2026/msrc_cve… | self |
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"category": "product_version_range",
"name": "azl3 expat 0:2.6.4-5.azl3",
"product": {
"name": "azl3 expat 0:2.6.4-5.azl3",
"product_id": "2"
}
},
{
"category": "product_version_range",
"name": "azl3 expat 0:2.6.4-6.azl3",
"product": {
"name": "azl3 expat 0:2.6.4-6.azl3",
"product_id": "1"
}
}
],
"category": "product_name",
"name": "expat"
},
{
"branches": [
{
"category": "product_version_range",
"name": "cbl2 python3 0:3.9.19-19.cbl2",
"product": {
"name": "cbl2 python3 0:3.9.19-19.cbl2",
"product_id": "7"
}
}
],
"category": "product_name",
"name": "python3"
},
{
"category": "product_name",
"name": "azl3 cmake 0:3.30.3-13.azl3",
"product": {
"name": "azl3 cmake 0:3.30.3-13.azl3",
"product_id": "4"
}
},
{
"category": "product_name",
"name": "azl3 python3 0:3.12.9-10.azl3",
"product": {
"name": "azl3 python3 0:3.12.9-10.azl3",
"product_id": "5"
}
},
{
"category": "product_name",
"name": "cbl2 cmake 0:3.21.4-23.cbl2",
"product": {
"name": "cbl2 cmake 0:3.21.4-23.cbl2",
"product_id": "3"
}
}
],
"category": "vendor",
"name": "Microsoft"
}
],
"relationships": [
{
"category": "default_component_of",
"full_product_name": {
"name": "cbl2 expat 0:2.6.4-4.cbl2 as a component of CBL Mariner 2.0",
"product_id": "17086-6"
},
"product_reference": "6",
"relates_to_product_reference": "17086"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "azl3 cmake 0:3.30.3-13.azl3 as a component of Azure Linux 3.0",
"product_id": "17084-4"
},
"product_reference": "4",
"relates_to_product_reference": "17084"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "azl3 python3 0:3.12.9-10.azl3 as a component of Azure Linux 3.0",
"product_id": "17084-5"
},
"product_reference": "5",
"relates_to_product_reference": "17084"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "azl3 expat 0:2.6.4-5.azl3 as a component of Azure Linux 3.0",
"product_id": "17084-2"
},
"product_reference": "2",
"relates_to_product_reference": "17084"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "azl3 expat 0:2.6.4-6.azl3 as a component of Azure Linux 3.0",
"product_id": "17084-1"
},
"product_reference": "1",
"relates_to_product_reference": "17084"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "cbl2 cmake 0:3.21.4-23.cbl2 as a component of CBL Mariner 2.0",
"product_id": "17086-3"
},
"product_reference": "3",
"relates_to_product_reference": "17086"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "cbl2 python3 0:3.9.19-19.cbl2 as a component of CBL Mariner 2.0",
"product_id": "17086-7"
},
"product_reference": "7",
"relates_to_product_reference": "17086"
}
]
},
"vulnerabilities": [
{
"cve": "CVE-2026-41080",
"cwe": {
"id": "CWE-331",
"name": "Insufficient Entropy"
},
"flags": [
{
"label": "component_not_present",
"product_ids": [
"17084-4",
"17084-5",
"17086-3"
]
}
],
"notes": [
{
"category": "general",
"text": "mitre",
"title": "Assigning CNA"
}
],
"product_status": {
"known_affected": [
"17086-6",
"17084-2",
"17084-1",
"17086-7"
],
"known_not_affected": [
"17084-4",
"17084-5",
"17086-3"
]
},
"references": [
{
"category": "self",
"summary": "CVE-2026-41080 libexpat before 2.8.0 uses insufficient entropy, and thus hash flooding can occur via a crafted XML document. - VEX",
"url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-41080.json"
}
],
"remediations": [
{
"category": "none_available",
"date": "2026-04-18T01:01:25.000Z",
"details": "There is no fix available for this vulnerability as of now",
"product_ids": [
"17086-6"
]
},
{
"category": "none_available",
"date": "2026-04-18T01:01:25.000Z",
"details": "There is no fix available for this vulnerability as of now",
"product_ids": [
"17084-2"
]
},
{
"category": "none_available",
"date": "2026-04-18T01:01:25.000Z",
"details": "There is no fix available for this vulnerability as of now",
"product_ids": [
"17084-1"
]
},
{
"category": "none_available",
"date": "2026-04-18T01:01:25.000Z",
"details": "There is no fix available for this vulnerability as of now",
"product_ids": [
"17086-7"
]
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "LOW",
"baseScore": 2.9,
"baseSeverity": "LOW",
"confidentialityImpact": "NONE",
"environmentalsScore": 0.0,
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"temporalScore": 2.9,
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L",
"version": "3.1"
},
"products": [
"17086-6",
"17084-2",
"17084-1",
"17086-7"
]
}
],
"title": "libexpat before 2.8.0 uses insufficient entropy, and thus hash flooding can occur via a crafted XML document."
}
]
}
OPENSUSE-SU-2026:10787-1
Vulnerability from csaf_opensuse - Published: 2026-05-16 00:00 - Updated: 2026-05-16 00:00Summary
expat-2.8.1-1.1 on GA media
Severity
Moderate
Notes
Title of the patch: expat-2.8.1-1.1 on GA media
Description of the patch: These are all security issues fixed in the expat-2.8.1-1.1 package on the GA media of openSUSE Tumbleweed.
Patchnames: openSUSE-Tumbleweed-2026-10787
Terms of use: CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).
Affected products
Recommended
20 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: openSUSE Tumbleweed:expat-2.8.1-1.1.aarch64 | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:expat-2.8.1-1.1.ppc64le | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:expat-2.8.1-1.1.s390x | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:expat-2.8.1-1.1.x86_64 | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:libexpat-devel-2.8.1-1.1.aarch64 | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:libexpat-devel-2.8.1-1.1.ppc64le | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:libexpat-devel-2.8.1-1.1.s390x | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:libexpat-devel-2.8.1-1.1.x86_64 | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:libexpat-devel-32bit-2.8.1-1.1.aarch64 | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:libexpat-devel-32bit-2.8.1-1.1.ppc64le | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:libexpat-devel-32bit-2.8.1-1.1.s390x | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:libexpat-devel-32bit-2.8.1-1.1.x86_64 | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:libexpat1-2.8.1-1.1.aarch64 | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:libexpat1-2.8.1-1.1.ppc64le | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:libexpat1-2.8.1-1.1.s390x | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:libexpat1-2.8.1-1.1.x86_64 | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:libexpat1-32bit-2.8.1-1.1.aarch64 | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:libexpat1-32bit-2.8.1-1.1.ppc64le | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:libexpat1-32bit-2.8.1-1.1.s390x | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:libexpat1-32bit-2.8.1-1.1.x86_64 | — |
Vendor Fix
|
Threats
Impact
low
Affected products
Recommended
20 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: openSUSE Tumbleweed:expat-2.8.1-1.1.aarch64 | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:expat-2.8.1-1.1.ppc64le | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:expat-2.8.1-1.1.s390x | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:expat-2.8.1-1.1.x86_64 | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:libexpat-devel-2.8.1-1.1.aarch64 | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:libexpat-devel-2.8.1-1.1.ppc64le | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:libexpat-devel-2.8.1-1.1.s390x | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:libexpat-devel-2.8.1-1.1.x86_64 | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:libexpat-devel-32bit-2.8.1-1.1.aarch64 | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:libexpat-devel-32bit-2.8.1-1.1.ppc64le | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:libexpat-devel-32bit-2.8.1-1.1.s390x | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:libexpat-devel-32bit-2.8.1-1.1.x86_64 | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:libexpat1-2.8.1-1.1.aarch64 | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:libexpat1-2.8.1-1.1.ppc64le | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:libexpat1-2.8.1-1.1.s390x | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:libexpat1-2.8.1-1.1.x86_64 | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:libexpat1-32bit-2.8.1-1.1.aarch64 | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:libexpat1-32bit-2.8.1-1.1.ppc64le | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:libexpat1-32bit-2.8.1-1.1.s390x | — |
Vendor Fix
|
|
| Unresolved product id: openSUSE Tumbleweed:libexpat1-32bit-2.8.1-1.1.x86_64 | — |
Vendor Fix
|
Threats
Impact
low
References
8 references
{
"document": {
"aggregate_severity": {
"namespace": "https://www.suse.com/support/security/rating/",
"text": "moderate"
},
"category": "csaf_security_advisory",
"csaf_version": "2.0",
"distribution": {
"text": "Copyright 2024 SUSE LLC. All rights reserved.",
"tlp": {
"label": "WHITE",
"url": "https://www.first.org/tlp/"
}
},
"lang": "en",
"notes": [
{
"category": "summary",
"text": "expat-2.8.1-1.1 on GA media",
"title": "Title of the patch"
},
{
"category": "description",
"text": "These are all security issues fixed in the expat-2.8.1-1.1 package on the GA media of openSUSE Tumbleweed.",
"title": "Description of the patch"
},
{
"category": "details",
"text": "openSUSE-Tumbleweed-2026-10787",
"title": "Patchnames"
},
{
"category": "legal_disclaimer",
"text": "CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).",
"title": "Terms of use"
}
],
"publisher": {
"category": "vendor",
"contact_details": "https://www.suse.com/support/security/contact/",
"name": "SUSE Product Security Team",
"namespace": "https://www.suse.com/"
},
"references": [
{
"category": "external",
"summary": "SUSE ratings",
"url": "https://www.suse.com/support/security/rating/"
},
{
"category": "self",
"summary": "URL of this CSAF notice",
"url": "https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2026_10787-1.json"
},
{
"category": "self",
"summary": "SUSE CVE CVE-2026-41080 page",
"url": "https://www.suse.com/security/cve/CVE-2026-41080/"
},
{
"category": "self",
"summary": "SUSE CVE CVE-2026-45186 page",
"url": "https://www.suse.com/security/cve/CVE-2026-45186/"
}
],
"title": "expat-2.8.1-1.1 on GA media",
"tracking": {
"current_release_date": "2026-05-16T00:00:00Z",
"generator": {
"date": "2026-05-16T00:00:00Z",
"engine": {
"name": "cve-database.git:bin/generate-csaf.pl",
"version": "1"
}
},
"id": "openSUSE-SU-2026:10787-1",
"initial_release_date": "2026-05-16T00:00:00Z",
"revision_history": [
{
"date": "2026-05-16T00:00:00Z",
"number": "1",
"summary": "Current version"
}
],
"status": "final",
"version": "1"
}
},
"product_tree": {
"branches": [
{
"branches": [
{
"branches": [
{
"category": "product_version",
"name": "expat-2.8.1-1.1.aarch64",
"product": {
"name": "expat-2.8.1-1.1.aarch64",
"product_id": "expat-2.8.1-1.1.aarch64"
}
},
{
"category": "product_version",
"name": "libexpat-devel-2.8.1-1.1.aarch64",
"product": {
"name": "libexpat-devel-2.8.1-1.1.aarch64",
"product_id": "libexpat-devel-2.8.1-1.1.aarch64"
}
},
{
"category": "product_version",
"name": "libexpat-devel-32bit-2.8.1-1.1.aarch64",
"product": {
"name": "libexpat-devel-32bit-2.8.1-1.1.aarch64",
"product_id": "libexpat-devel-32bit-2.8.1-1.1.aarch64"
}
},
{
"category": "product_version",
"name": "libexpat1-2.8.1-1.1.aarch64",
"product": {
"name": "libexpat1-2.8.1-1.1.aarch64",
"product_id": "libexpat1-2.8.1-1.1.aarch64"
}
},
{
"category": "product_version",
"name": "libexpat1-32bit-2.8.1-1.1.aarch64",
"product": {
"name": "libexpat1-32bit-2.8.1-1.1.aarch64",
"product_id": "libexpat1-32bit-2.8.1-1.1.aarch64"
}
}
],
"category": "architecture",
"name": "aarch64"
},
{
"branches": [
{
"category": "product_version",
"name": "expat-2.8.1-1.1.ppc64le",
"product": {
"name": "expat-2.8.1-1.1.ppc64le",
"product_id": "expat-2.8.1-1.1.ppc64le"
}
},
{
"category": "product_version",
"name": "libexpat-devel-2.8.1-1.1.ppc64le",
"product": {
"name": "libexpat-devel-2.8.1-1.1.ppc64le",
"product_id": "libexpat-devel-2.8.1-1.1.ppc64le"
}
},
{
"category": "product_version",
"name": "libexpat-devel-32bit-2.8.1-1.1.ppc64le",
"product": {
"name": "libexpat-devel-32bit-2.8.1-1.1.ppc64le",
"product_id": "libexpat-devel-32bit-2.8.1-1.1.ppc64le"
}
},
{
"category": "product_version",
"name": "libexpat1-2.8.1-1.1.ppc64le",
"product": {
"name": "libexpat1-2.8.1-1.1.ppc64le",
"product_id": "libexpat1-2.8.1-1.1.ppc64le"
}
},
{
"category": "product_version",
"name": "libexpat1-32bit-2.8.1-1.1.ppc64le",
"product": {
"name": "libexpat1-32bit-2.8.1-1.1.ppc64le",
"product_id": "libexpat1-32bit-2.8.1-1.1.ppc64le"
}
}
],
"category": "architecture",
"name": "ppc64le"
},
{
"branches": [
{
"category": "product_version",
"name": "expat-2.8.1-1.1.s390x",
"product": {
"name": "expat-2.8.1-1.1.s390x",
"product_id": "expat-2.8.1-1.1.s390x"
}
},
{
"category": "product_version",
"name": "libexpat-devel-2.8.1-1.1.s390x",
"product": {
"name": "libexpat-devel-2.8.1-1.1.s390x",
"product_id": "libexpat-devel-2.8.1-1.1.s390x"
}
},
{
"category": "product_version",
"name": "libexpat-devel-32bit-2.8.1-1.1.s390x",
"product": {
"name": "libexpat-devel-32bit-2.8.1-1.1.s390x",
"product_id": "libexpat-devel-32bit-2.8.1-1.1.s390x"
}
},
{
"category": "product_version",
"name": "libexpat1-2.8.1-1.1.s390x",
"product": {
"name": "libexpat1-2.8.1-1.1.s390x",
"product_id": "libexpat1-2.8.1-1.1.s390x"
}
},
{
"category": "product_version",
"name": "libexpat1-32bit-2.8.1-1.1.s390x",
"product": {
"name": "libexpat1-32bit-2.8.1-1.1.s390x",
"product_id": "libexpat1-32bit-2.8.1-1.1.s390x"
}
}
],
"category": "architecture",
"name": "s390x"
},
{
"branches": [
{
"category": "product_version",
"name": "expat-2.8.1-1.1.x86_64",
"product": {
"name": "expat-2.8.1-1.1.x86_64",
"product_id": "expat-2.8.1-1.1.x86_64"
}
},
{
"category": "product_version",
"name": "libexpat-devel-2.8.1-1.1.x86_64",
"product": {
"name": "libexpat-devel-2.8.1-1.1.x86_64",
"product_id": "libexpat-devel-2.8.1-1.1.x86_64"
}
},
{
"category": "product_version",
"name": "libexpat-devel-32bit-2.8.1-1.1.x86_64",
"product": {
"name": "libexpat-devel-32bit-2.8.1-1.1.x86_64",
"product_id": "libexpat-devel-32bit-2.8.1-1.1.x86_64"
}
},
{
"category": "product_version",
"name": "libexpat1-2.8.1-1.1.x86_64",
"product": {
"name": "libexpat1-2.8.1-1.1.x86_64",
"product_id": "libexpat1-2.8.1-1.1.x86_64"
}
},
{
"category": "product_version",
"name": "libexpat1-32bit-2.8.1-1.1.x86_64",
"product": {
"name": "libexpat1-32bit-2.8.1-1.1.x86_64",
"product_id": "libexpat1-32bit-2.8.1-1.1.x86_64"
}
}
],
"category": "architecture",
"name": "x86_64"
},
{
"branches": [
{
"category": "product_name",
"name": "openSUSE Tumbleweed",
"product": {
"name": "openSUSE Tumbleweed",
"product_id": "openSUSE Tumbleweed",
"product_identification_helper": {
"cpe": "cpe:/o:opensuse:tumbleweed"
}
}
}
],
"category": "product_family",
"name": "SUSE Linux Enterprise"
}
],
"category": "vendor",
"name": "SUSE"
}
],
"relationships": [
{
"category": "default_component_of",
"full_product_name": {
"name": "expat-2.8.1-1.1.aarch64 as component of openSUSE Tumbleweed",
"product_id": "openSUSE Tumbleweed:expat-2.8.1-1.1.aarch64"
},
"product_reference": "expat-2.8.1-1.1.aarch64",
"relates_to_product_reference": "openSUSE Tumbleweed"
},
{
"category": "default_component_of",
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RHSA-2026:11004
Vulnerability from csaf_redhat - Published: 2026-04-27 18:40 - Updated: 2026-04-27 19:45Summary
Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update
Severity
Low
Notes
Topic: An update for Red Hat Hardened Images RPMs is now available.
Details: This update includes the following RPMs:
expat:
* expat-2.8.0-0.1.hum1 (aarch64, x86_64)
* expat-devel-2.8.0-0.1.hum1 (aarch64, x86_64)
* expat-static-2.8.0-0.1.hum1 (aarch64, x86_64)
* expat-2.8.0-0.1.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 libexpat. A remote attacker could exploit this vulnerability by providing a specially crafted XML document that leverages insufficient entropy in the hash function. This can lead to hash flooding, a type of Denial of Service (DoS) attack, where the system becomes unresponsive or crashes due to excessive resource consumption.
CWE-331 - Insufficient EntropyAffected products
Fixed
3 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: Red Hat Hardened Images:expat-main@aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:expat-main@src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:expat-main@x86_64 | — |
Vendor Fix
fix
Workaround
|
Threats
Impact
Low
References
11 references
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"text": "An update for Red Hat Hardened Images RPMs is now available.",
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"text": "This update includes the following RPMs:\n\nexpat:\n * expat-2.8.0-0.1.hum1 (aarch64, x86_64)\n * expat-devel-2.8.0-0.1.hum1 (aarch64, x86_64)\n * expat-static-2.8.0-0.1.hum1 (aarch64, x86_64)\n * expat-2.8.0-0.1.hum1.src (src)",
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"url": "https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_11004.json"
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"title": "Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update",
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"date": "2026-04-27T18:40:20+00:00",
"number": "1",
"summary": "Initial version"
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{
"date": "2026-04-27T19:15:15+00:00",
"number": "2",
"summary": "Last updated version"
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"date": "2026-04-27T19:45:14+00:00",
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"version": "3"
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"vulnerabilities": [
{
"cve": "CVE-2026-41080",
"cwe": {
"id": "CWE-331",
"name": "Insufficient Entropy"
},
"discovery_date": "2026-04-16T17:01:06.076498+00:00",
"ids": [
{
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"text": "2458967"
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"notes": [
{
"category": "description",
"text": "A flaw was found in libexpat. A remote attacker could exploit this vulnerability by providing a specially crafted XML document that leverages insufficient entropy in the hash function. This can lead to hash flooding, a type of Denial of Service (DoS) attack, where the system becomes unresponsive or crashes due to excessive resource consumption.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "libexpat: expat: libexpat: Denial of Service via hash flooding with crafted XML",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This Low impact denial of service flaw in libexpat could allow a remote attacker to cause the program consuming libexpat to become unresponsive or crash. This vulnerability requires the processing of a specially crafted XML document, which could lead to excessive resource consumption due to hash flooding.",
"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.",
"title": "CVSS score applicability"
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],
"product_status": {
"fixed": [
"Red Hat Hardened Images:expat-main@aarch64",
"Red Hat Hardened Images:expat-main@src",
"Red Hat Hardened Images:expat-main@x86_64"
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"url": "https://access.redhat.com/security/cve/CVE-2026-41080"
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{
"category": "external",
"summary": "RHBZ#2458967",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2458967"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-41080",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-41080"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-41080",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-41080"
},
{
"category": "external",
"summary": "https://github.com/libexpat/libexpat/issues/47",
"url": "https://github.com/libexpat/libexpat/issues/47"
},
{
"category": "external",
"summary": "https://github.com/libexpat/libexpat/pull/1183",
"url": "https://github.com/libexpat/libexpat/pull/1183"
}
],
"release_date": "2026-04-16T16:52:01.177000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-04-27T18:40:20+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:expat-main@aarch64",
"Red Hat Hardened Images:expat-main@src",
"Red Hat Hardened Images:expat-main@x86_64"
],
"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2026:11004"
},
{
"category": "workaround",
"details": "Applications that process untrusted XML documents using libexpat should implement robust input validation to filter out malicious XML structures. Restricting access to services that process untrusted XML can also reduce the attack surface. If a service is affected, restarting it may be required after implementing input validation or access restrictions.",
"product_ids": [
"Red Hat Hardened Images:expat-main@aarch64",
"Red Hat Hardened Images:expat-main@src",
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}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 3.7,
"baseSeverity": "LOW",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L",
"version": "3.1"
},
"products": [
"Red Hat Hardened Images:expat-main@aarch64",
"Red Hat Hardened Images:expat-main@src",
"Red Hat Hardened Images:expat-main@x86_64"
]
}
],
"threats": [
{
"category": "impact",
"details": "Low"
}
],
"title": "libexpat: expat: libexpat: Denial of Service via hash flooding with crafted XML"
}
]
}
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Trend slope:
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(linear fit over daily sighting counts)
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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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