An Important vulnerability (CVE-2026-8177, CVSS 7.5 HIGH) in the perl-XML-LibXML module allows for a Denial of Service attack via truncated UTF-8 characters in XML node names. The flaw affects Red Hat Enterprise Linux 10 systems, and Red Hat has released a security update to address it. IT professionals should apply the referenced Red Hat errata update to their affected RHEL 10 deployments.
Red Hat Product Errata RHSA-2026:39547 - Security Advisory Issued: 2026-07-14 Updated: 2026-07-14 RHSA-2026:39547 - Security Advisory Overview Updated Packages Synopsis Important: perl-XML-LibXML security update Type/Severity Security Advisory: Important Red Hat Lightspeed patch analysis Identify and remediate systems affected by this advisory. View affected systems Topic An update for perl-XML-LibXML is now available for Red Hat Enterprise Linux 10. 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. Description This module implements a Perl interface to the GNOME libxml2 library which provides interfaces for parsing and manipulating XML files. This module allows Perl programmers to make use of the highly capable validating XML parser and the high performance DOM implementation. Security Fix(es): perl-XML-LibXML: XML::LibXML: Denial of Service via truncated UTF-8 in XML node names (CVE-2026-8177) 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. Solution For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Affected Products Red Hat Enterprise Linux for x86_64 10 x86_64 Red Hat Enterprise Linux for x86_64 - Extended Update Support 10.2 x86_64 Red Hat Enterprise Linux for IBM z Systems 10 s390x Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 10.2 s390x Red Hat Enterprise Linux for Power, little endian 10 ppc64le Red Hat Enterprise Linux for Power, little endian - Extended Update Support 10.2 ppc64le Red Hat Enterprise Linux for ARM 64 10 aarch64 Red Hat Enterprise Linux for ARM 64 - Extended Update Support 10.2 aarch64 Red Hat Enterprise Linux for ARM 64 - 4 years of updates 10.2 aarch64 Red Hat Enterprise Linux for IBM z Systems - 4 years of updates 10.2 s390x Red Hat Enterprise Linux for Power, little endian - 4 years of support 10.2 ppc64le Red Hat Enterprise Linux for x86_64 - 4 years of updates 10.2 x86_64 Red Hat Enterprise Linux for x86_64 - Extended Life Cycle 10.2 x86_64 Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle 10.2 aarch64 Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle 10.2 ppc64le Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle 10.2 s390x Fixes BZ - 2468684 - CVE-2026-8177 perl-XML-LibXML: XML::LibXML: Denial of Service via truncated UTF-8 in XML node names CVEs CVE-2026-8177 References https://access.redhat.com/security/updates/classification/#important Note: More recent versions of these packages may be available. Click a package name for more details. Red Hat Enterprise Linux for x86_64 10 SRPM perl-XML-LibXML-2.0210-4.el10_2.1.src.rpm SHA-256: 048a86fde3deb664f332568b399dd8d896021b8f8b21a24506f62b4cfb10dacc x86_64 perl-XML-LibXML-2.0210-4.el10_2.1.x86_64.rpm SHA-256: 3871fdb49ce8c164d05965063d98992fc52815f7106b421b506a1d16e739dee0 perl-XML-LibXML-debuginfo-2.0210-4.el10_2.1.x86_64.rpm SHA-256: b65a7cd8c38989b2fd424b5125b799294d656f6ebf9b3bf52e6ad8664113e526 perl-XML-LibXML-debugsource-2.0210-4.el10_2.1.x86_64.rpm SHA-256: d732a7606f01ac275dcf2fc8956b0b6feca8b97431563cfa3a7346785917f9ab Red Hat Enterprise Linux for x86_64 - Extended Update Support 10.2 SRPM perl-XML-LibXML-2.0210-4.el10_2.1.src.rpm SHA-256: 048a86fde3deb664f332568b399dd8d896021b8f8b21a24506f62b4cfb10dacc x86_64 perl-XML-LibXML-2.0210-4.el10_2.1.x86_64.rpm SHA-256: 3871fdb49ce8c164d05965063d98992fc52815f7106b421b506a1d16e739dee0 perl-XML-LibXML-debuginfo-2.0210-4.el10_2.1.x86_64.rpm SHA-256: b65a7cd8c38989b2fd424b5125b799294d656f6ebf9b3bf52e6ad8664113e526 perl-XML-LibXML-debugsource-2.0210-4.el10_2.1.x86_64.rpm SHA-256: d732a7606f01ac275dcf2fc8956b0b6feca8b97431563cfa3a7346785917f9ab Red Hat Enterprise Linux for IBM z Systems 10 SRPM perl-XML-LibXML-2.0210-4.el10_2.1.src.rpm SHA-256: 048a86fde3deb664f332568b399dd8d896021b8f8b21a24506f62b4cfb10dacc s390x perl-XML-LibXML-2.0210-4.el10_2.1.s390x.rpm SHA-256: d8c2a34f70ef63f086e8c04e488d1355f66d6fcf05f118149c9da1b7a21242d7 perl-XML-LibXML-debuginfo-2.0210-4.el10_2.1.s390x.rpm SHA-256: 758ddb02f85c9f4bdfc1d08498e2c75e9069320dec09831cb08fb4213aff6174 perl-XML-LibXML-debugsource-2.0210-4.el10_2.1.s390x.rpm SHA-256: a84c184af361e375ac9d545b30da93083aa983b99f3cad824a517c013be757be Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 10.2 SRPM perl-XML-LibXML-2.0210-4.el10_2.1.src.rpm SHA-256: 048a86fde3deb664f332568b399dd8d896021b8f8b21a24506f62b4cfb10dacc s390x perl-XML-LibXML-2.0210-4.el10_2.1.s390x.rpm SHA-256: d8c2a34f70ef63f086e8c04e488d1355f66d6fcf05f118149c9da1b7a21242d7 perl-XML-LibXML-debuginfo-2.0210-4.el10_2.1.s390x.rpm SHA-256: 758ddb02f85c9f4bdfc1d08498e2c75e9069320dec09831cb08fb4213aff6174 perl-XML-LibXML-debugsource-2.0210-4.el10_2.1.s390x.rpm SHA-256: a84c184af361e375ac9d545b30da93083aa983b99f3cad824a517c013be757be Red Hat Enterprise Linux for Power, little endian 10 SRPM perl-XML-LibXML-2.0210-4.el10_2.1.src.rpm SHA-256: 048a86fde3deb664f332568b399dd8d896021b8f8b21a24506f62b4cfb10dacc ppc64le perl-XML-LibXML-2.0210-4.el10_2.1.ppc64le.rpm SHA-256: 9cc7cf7ceac3d0f26486689c2ef62c37d411a7c8e4e1778e3296b9cb8e8f945e perl-XML-LibXML-debuginfo-2.0210-4.el10_2.1.ppc64le.rpm SHA-256: 6a47062ca41cfd7a21d866f3c21dbbb4bc83fa939068e58f90260da8ae706992 perl-XML-LibXML-debugsource-2.0210-4.el10_2.1.ppc64le.rpm SHA-256: ed465ea75007485e440aa7f8aacb3edf3815e2b45f065fac337a1d7da34bb771 Red Hat Enterprise Linux for Power, little endian - Extended Update Support 10.2 SRPM perl-XML-LibXML-2.0210-4.el10_2.1.src.rpm SHA-256: 048a86fde3deb664f332568b399dd8d896021b8f8b21a24506f62b4cfb10dacc ppc64le perl-XML-LibXML-2.0210-4.el10_2.1.ppc64le.rpm SHA-256: 9cc7cf7ceac3d0f26486689c2ef62c37d411a7c8e4e1778e3296b9cb8e8f945e perl-XML-LibXML-debuginfo-2.0210-4.el10_2.1.ppc64le.rpm SHA-256: 6a47062ca41cfd7a21d866f3c21dbbb4bc83fa939068e58f90260da8ae706992 perl-XML-LibXML-debugsource-2.0210-4.el10_2.1.ppc64le.rpm SHA-256: ed465ea75007485e440aa7f8aacb3edf3815e2b45f065fac337a1d7da34bb771 Red Hat Enterprise Linux for ARM 64 10 SRPM perl-XML-LibXML-2.0210-4.el10_2.1.src.rpm SHA-256: 048a86fde3deb664f332568b399dd8d896021b8f8b21a24506f62b4cfb10dacc aarch64 perl-XML-LibXML-2.0210-4.el10_2.1.aarch64.rpm SHA-256: dddec5b5b265c0dc08560d2be67eda6d149a4c6f2c4f33d216c52eab8ef92556 perl-XML-LibXML-debuginfo-2.0210-4.el10_2.1.aarch64.rpm SHA-256: 02c78ba04c64128025d68d0180261a327ea704b71bf14e7d0bb986c5f3070f11 perl-XML-LibXML-debugsource-2.0210-4.el10_2.1.aarch64.rpm SHA-256: 2d4c5a305cf17fa5138ba45b51f9c7658979068251e7322af001da31a76a1efa Red Hat Enterprise Linux for ARM 64 - Extended Update Support 10.2 SRPM perl-XML-LibXML-2.0210-4.el10_2.1.src.rpm SHA-256: 048a86fde3deb664f332568b399dd8d896021b8f8b21a24506f62b4cfb10dacc aarch64 perl-XML-LibXML-2.0210-4.el10_2.1.aarch64.rpm SHA-256: dddec5b5b265c0dc08560d2be67eda6d149a4c6f2c4f33d216c52eab8ef92556 perl-XML-LibXML-debuginfo-2.0210-4.el10_2.1.aarch64.rpm SHA-256: 02c78ba04c64128025d68d0180261a327ea704b71bf14e7d0bb986c5f3070f11 perl-XML-LibXML-debugsource-2.0210-4.el10_2.1.aarch64.rpm SHA-256: 2d4c5a305cf17fa5138ba45b51f9c7658979068251e7322af001da31a76a1efa Red Hat Enterprise Linux for ARM 64 - 4 years of updates 10.2 SRPM perl-XML-LibXML-2.0210-4.el10_2.1.src.rpm SHA-256: 048a86fde3deb664f332568b399dd8d896021b8f8b21a24506f62b4cfb10dacc aarch64 perl-XML-LibXML-2.0210-4.el10_2.1.aarch64.rpm SHA-256: dddec5b5b265c0dc08560d2be67eda6d149a4c6f2c4f33d216c52eab8ef92556 perl-XML-LibXML-debuginfo-2.0210-4.el10_2.1.aarch64.rpm SHA-256: 02c78ba04c64128025d68d0180261a327ea704b71bf14e7d0bb986c5f3070f11 perl-XML-LibXML-debugsource-2.0210-4.el10_2.1.aarch64.rpm SHA-256: 2d4c5a305cf17fa5138ba45b51f9c7658979068251e7322af001da31a76a1efa Red Hat Enterprise Linux for IBM z Systems - 4 years of updates 10.2 SRPM perl-XML-LibXML-2.0210-4.el10_2.1.src.rpm SHA-256: 048a86fde3deb664f332568b399dd8d896021b8f8b21a24506f62b4cfb10dacc s390x perl-XML-LibXML-2.0210-4.el10_2.1.s390x.rpm SHA-256: d8c2a34f70ef63f086e8c04e488d1355f66d6fcf05f118149c9da1b7a21242d7 perl-XML-LibXML-debuginfo-2.0210-4.el10_2.1.s390x.rpm SHA-256: 758ddb02f85c9f4bdfc1d08498e2c75e9069320dec09831cb08fb4213aff6174 perl-XML-LibXML-debugsource-2.0210-4.el10_2.1.s390x.rpm SHA-256: a84c184af361e375ac9d545b30da93083aa983b99f3cad824a517c013be757be Red Hat Enterprise Linux for Power, little endian - 4 years of support 10.2 SRPM perl-XML-LibXML-2.0210-4.el10_2.1.src.rpm SHA-256: 048a86fde3deb664f332568b399dd8d896021b8f8b21a24506f62b4cfb10dacc ppc64le perl-XML-LibXML-2.0210-4.el10_2.1.ppc64le.rpm SHA-256: 9cc7cf7ceac3d0f26486689c2ef62c37d411a7c8e4e1778e3296b9cb8e8f945e perl-XML-LibXML-debuginfo-2.0210-4.el10_2.1.ppc64le.rpm SHA-256: 6a47062ca41cfd7a21d866f3c21dbbb4bc83fa939068e58f90260da8ae706992 perl-XML-LibXML-debugsource-2.0210-4.el10_2.1.ppc64le.rpm SHA-256: ed465ea75007485e440aa7f8aacb3edf3815e2b45f065fac337a1d7da34bb771 Red Hat Enterprise Linux for x86_64 - 4 years of updates 10.2 SRPM perl-XML-LibXML-2.0210-4.el10_2.1.src.rpm SHA-256: 048a86fde3deb664f332568b399dd8d896021b8f8b21a24506f62b4cfb10dacc x86_64 perl-XML-LibXML-2.0210-4.el10_2.1.x86_64.rpm SHA-256: 3871fdb49ce8c164d05965063d98992fc52815f7106b421b506a1d16e739dee0 perl-XML-LibXML-debuginfo-2.0210-4.el10_2.1.x86_64.rpm SHA-256: b65a7cd8c38989b2fd424b5125b799294d656f6ebf9b3bf52e6ad8664113e526 perl-XML-LibXML-debugsource-2.0210-4.el10_2.1.x86_64.rpm SHA-256: d732a7606f01ac275dcf2fc8956b0b6feca8b97431563cfa3a7346785917f9ab Red Hat Enterprise Linux for x86_64 - Extended Life Cycle 10.2 SRPM perl-XML-LibXML-2.0210-4.el10_2.1.src.rpm SHA-256: 048a86fde3deb664f332568b399dd8d896021b8f8b21a24506f62b4cfb10dacc x86_64 perl-XML-LibXML-2.0210-4.el10_2.1.x86_64