CVE-2026-8177 Memory corruption in XML::LibXML
Attacker can cause denial of service by triggering out-of-bounds heap reads in XML::LibXML via truncated UTF-8 node names.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-8177?
CVE-2026-8177 is a high-severity memory corruption vulnerability in SHLOMIF XML::LibXML, published on 10 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
XML::LibXML versions through 2.0210 for Perl read out-of-bounds heap memory when parsing XML node names containing truncated UTF-8 byte sequences.
A node name ending in the middle of a multi byte UTF-8 sequence causes the parser to read past the end of the input string into adjacent heap memory.
Any Perl process that passes attacker controlled strings to XML::LibXML's DOM node-name methods can reach this path on the default API. The likely consequence is a crash, causing denial of service.
Weakness: CWE-125
Which versions are affected by CVE-2026-8177?
Linux distribution packages (36)
perl-XML-LibXML AlmaLinux:10 | All versions | 1:2.0210-4.el10_2.1 |
perl-XML-LibXML AlmaLinux:8 | All versions | 1:2.0132-3.el8_10 |
perl-XML-LibXML AlmaLinux:9 | All versions | 1:2.0206-5.el9_8.1 |
perl-XML-LibXML Red Hat:enterprise_linux:10.2 | All versions | 1:2.0210-4.el10_2.1 |
perl-XML-LibXML-debuginfo Red Hat:enterprise_linux:10.2 | All versions | 1:2.0210-4.el10_2.1 |
perl-XML-LibXML-debugsource Red Hat:enterprise_linux:10.2 | All versions | 1:2.0210-4.el10_2.1 |
perl-XML-LibXML Red Hat:enterprise_linux:8::appstream | All versions | 1:2.0132-3.el8_10 |
perl-XML-LibXML-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 1:2.0132-3.el8_10 |
perl-XML-LibXML-debugsource Red Hat:enterprise_linux:8::appstream | All versions | 1:2.0132-3.el8_10 |
perl-XML-LibXML Red Hat:enterprise_linux:9::appstream | All versions | 1:2.0206-5.el9_8.1 |
perl-XML-LibXML-debuginfo Red Hat:enterprise_linux:9::appstream | All versions | 1:2.0206-5.el9_8.1 |
perl-XML-LibXML-debugsource Red Hat:enterprise_linux:9::appstream | All versions | 1:2.0206-5.el9_8.1 |
perl-XML-LibXML Red Hat:enterprise_linux_eus:10.0 | All versions | 1:2.0210-4.el10_0.1 |
perl-XML-LibXML Red Hat:rhel_e4s:9.2::appstream | All versions | 1:2.0206-5.el9_2.1 |
perl-XML-LibXML Red Hat:rhel_e4s:9.4::appstream | All versions | 1:2.0206-5.el9_4.1 |
perl-XML-LibXML Red Hat:rhel_eus:9.6::appstream | All versions | 1:2.0206-5.el9_6.1 |
perl-XML-LibXML Rocky Linux:10 | All versions | 1:2.0210-4.el10_2.1 |
perl-XML-LibXML Rocky Linux:8 | All versions | 1:2.0132-3.el8_10 |
perl-XML-LibXML Rocky Linux:9 | All versions | 1:2.0206-5.el9_8.1 |
perl-XML-LibXML SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | All versions | 2.0132-150000.3.8.1 |
perl-XML-LibXML SUSE:Linux Enterprise High Performance Computing 15 SP4-LTSS | All versions | 2.0132-150000.3.8.1 |
perl-XML-LibXML SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOS | All versions | 2.0132-150000.3.8.1 |
perl-XML-LibXML SUSE:Linux Enterprise High Performance Computing 15 SP5-LTSS | All versions | 2.0132-150000.3.8.1 |
perl-XML-LibXML SUSE:Linux Enterprise Module for Basesystem 15 SP7 | All versions | 2.0132-150000.3.8.1 |
perl-XML-LibXML SUSE:Linux Enterprise Server 12 SP5-LTSS | All versions | 2.0019-6.8.1 |
perl-XML-LibXML SUSE:Linux Enterprise Server 15 SP4-LTSS | All versions | 2.0132-150000.3.8.1 |
perl-XML-LibXML SUSE:Linux Enterprise Server 15 SP5-LTSS | All versions | 2.0132-150000.3.8.1 |
perl-XML-LibXML SUSE:Linux Enterprise Server 15 SP6-LTSS | All versions | 2.0132-150000.3.8.1 |
perl-XML-LibXML SUSE:Linux Enterprise Server 16.0 | All versions | 2.0210-160000.3.1 |
perl-XML-LibXML SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5 | All versions | 2.0019-6.8.1 |
perl-XML-LibXML SUSE:Linux Enterprise Server for SAP Applications 15 SP4 | All versions | 2.0132-150000.3.8.1 |
perl-XML-LibXML SUSE:Linux Enterprise Server for SAP Applications 15 SP5 | All versions | 2.0132-150000.3.8.1 |
perl-XML-LibXML SUSE:Linux Enterprise Server for SAP Applications 15 SP6 | All versions | 2.0132-150000.3.8.1 |
perl-XML-LibXML SUSE:Linux Enterprise Server for SAP applications 16.0 | All versions | 2.0210-160000.3.1 |
perl-XML-LibXML openSUSE:Leap 16.0 | All versions | 2.0210-160000.3.1 |
perl-XML-LibXML openSUSE:Tumbleweed | All versions | 2.0212-1.1 |
How do I fix CVE-2026-8177?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-8177 being exploited?
There is no known exploitation of CVE-2026-8177 in the wild and no public exploit code.
Sources
Also known as ALSA-2026:39547, ALSA-2026:39553, ALSA-2026:39878, AZL-86550, CLSA-2026-1784553427, CLSA-2026-1784554254 and 21 more.