Red Hat Security Advisory: expat security update
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.
AI Analysis
Technical Summary
CVE-2026-45186 is a denial of service vulnerability in libexpat, a widely used C library for XML parsing. The vulnerability arises from processing crafted XML input that can cause the library to crash or become unresponsive. This affects Red Hat Enterprise Linux 8 and its variants. Red Hat Product Security has rated the update as important and released patched packages to mitigate the issue. The advisory references Red Hat's errata RHSA-2026:22721 for detailed remediation instructions.
Potential Impact
Successful exploitation of this vulnerability can cause denial of service conditions in applications relying on libexpat for XML parsing. This may lead to application crashes or service interruptions. There are no reports of exploitation in the wild. The impact is limited to availability degradation rather than code execution or data compromise.
Mitigation Recommendations
Red Hat has released updated packages for libexpat to fix this vulnerability. Users of affected Red Hat Enterprise Linux 8 versions should apply the security update as described in Red Hat advisory RHSA-2026:22721 and the referenced article https://access.redhat.com/articles/11258. Applying the official patch eliminates the risk of denial of service via crafted XML input. No additional mitigations are specified or required.
Red Hat Security Advisory: expat security update
Description
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.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-45186 is a denial of service vulnerability in libexpat, a widely used C library for XML parsing. The vulnerability arises from processing crafted XML input that can cause the library to crash or become unresponsive. This affects Red Hat Enterprise Linux 8 and its variants. Red Hat Product Security has rated the update as important and released patched packages to mitigate the issue. The advisory references Red Hat's errata RHSA-2026:22721 for detailed remediation instructions.
Potential Impact
Successful exploitation of this vulnerability can cause denial of service conditions in applications relying on libexpat for XML parsing. This may lead to application crashes or service interruptions. There are no reports of exploitation in the wild. The impact is limited to availability degradation rather than code execution or data compromise.
Mitigation Recommendations
Red Hat has released updated packages for libexpat to fix this vulnerability. Users of affected Red Hat Enterprise Linux 8 versions should apply the security update as described in Red Hat advisory RHSA-2026:22721 and the referenced article https://access.redhat.com/articles/11258. Applying the official patch eliminates the risk of denial of service via crafted XML input. No additional mitigations are specified or required.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:22721
- Cve Count
- 1
- Additional Cves
- []
- Cvss Version
- null
Threat ID: 6a209828e29bf47b50ebccec
Added to database: 6/3/2026, 9:10:00 PM
Last enriched: 6/3/2026, 9:11:22 PM
Last updated: 6/4/2026, 6:32:43 AM
Views: 6
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