{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-11979 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-11979 is a low-severity memory corruption vulnerability in Xmlsoft Libxml2, published on 29 Jun 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-11979 and fix it if it is affected.\n\nWhat it is: CVE-2026-11979 is a low-severity memory corruption vulnerability in Xmlsoft Libxml2, published on 29 Jun 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-11979 in the wild and no public exploit code.\n\nAffected product: Xmlsoft Libxml2. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-11979/ (Markdown: https://insights.sbomify.com/CVE-2026-11979/index.md)","id":"CVE-2026-11979","markdown":"https://insights.sbomify.com/CVE-2026-11979/index.md","name":"CVE-2026-11979","record":{"aliases":["ALSA-2026:60394","ALSA-2026:61248","CLSA-2026-1782998484","CLSA-2026-1783006034","CLSA-2026-1783076182","CLSA-2026-1783076452","CLSA-2026-1783093006","CLSA-2026-1783093248","CLSA-2026-1783095251","CLSA-2026-1783095447","CLSA-2026-1783587336","CLSA-2026-1783587973","CLSA-2026-1783588204","CLSA-2026-1783632090","CLSA-2026-1783670609","CLSA-2026-1783948495","DEBIAN-CVE-2026-11979","ECHO-eb03-65da-1e8c","GHSA-h67q-h62w-5mjr","OESA-2026-3039","RHSA-2026:33840","RHSA-2026:60394","RHSA-2026:61248","RLSA-2026:60394","RLSA-2026:61248","SUSE-SU-2026:22806-1","SUSE-SU-2026:22894-1","SUSE-SU-2026:3095-1","SUSE-SU-2026:3096-1","SUSE-SU-2026:3097-1","SUSE-SU-2026:3111-1","UBUNTU-CVE-2026-11979","openSUSE-SU-2026:11258-1"],"analysis":{"component_type":"library","fix_type":"patch","impacts":["code_execution","denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":true,"product_category":"XML parsing library","requires_auth":"none","summary":"Stack-based buffer overflow in libxml2's xmlcatalog utility allows arbitrary code execution or crashes when processing long input in shell mode.","user_interaction":"required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"CERT-PL","cpe":[{"product":"libxml2","vendor":"xmlsoft"}],"cvss":{"score":1.8,"severity":"low","source":"cna","vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:L/SC:L/SI:L/SA:N","version":"4.0"},"cwes":[{"id":"CWE-121","name":"Stack-based Buffer Overflow"}],"description":"libxml2 is vulnerable to multiple stack-based buffer overflows in the xmlcatalog utility when running in --shell mode. The usershell() function processes user input using fixed-size stack buffers without proper bounds checking.\nBy supplying an overly long input line, an attacker can overflow internal buffers (command, arg, and argv) during input parsing. This results in memory corruption within the stack frame.\nSuccessful exploitation may cause a crash or potentially allow arbitrary code execution in the context of the xmlcatalog process.\n\nThis issue has been fixed in the commit c2e233fc.\n\nNOTE:\nThe maintainers of this project did not agree that this issue is a vulnerability and considered it a bug.","ecosystems":["AlmaLinux:10","AlmaLinux:8","Red Hat:enterprise_linux:10.2","Red Hat:enterprise_linux:8::appstream","Red Hat:enterprise_linux:8::baseos","Red Hat:hummingbird:1","Rocky Linux:10","Rocky Linux:8","SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS","SUSE:Linux Enterprise High Performance Computing 15 SP4-LTSS","SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOS","SUSE:Linux Enterprise High Performance Computing 15 SP5-LTSS","SUSE:Linux Enterprise Micro 5.3","SUSE:Linux Enterprise Micro 5.4","SUSE:Linux Enterprise Micro 5.5","SUSE:Linux Enterprise Module for Basesystem 15 SP7","SUSE:Linux Enterprise Module for Python 3 15 SP7","SUSE:Linux Enterprise Server 12 SP5-LTSS","SUSE:Linux Enterprise Server 15 SP4-LTSS","SUSE:Linux Enterprise Server 15 SP5-LTSS","SUSE:Linux Enterprise Server 15 SP6-LTSS","SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5","SUSE:Linux Enterprise Server for SAP Applications 15 SP4","SUSE:Linux Enterprise Server for SAP Applications 15 SP5","SUSE:Linux Enterprise Server for SAP Applications 15 SP6","SUSE:Linux Micro 6.0","SUSE:Linux Micro 6.1","openSUSE:Tumbleweed"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Stack-Based Buffer Overflow in libxml2","id":"CVE-2026-11979","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"xmlsoft:libxml2","products":["xmlsoft:libxml2"],"type":"memory_corruption","year":"2026"},"n_packages":68,"n_references":2,"next":{"headline":"Code execution in IBM Desktop App","id":"CVE-2026-11980"},"packages":[{"ecosystem":"AlmaLinux:10","fixed":["2.12.5-10.el10_2.3"],"introduced":["0"],"last_affected":[],"package":"libxml2","purl":"pkg:rpm/almalinux/libxml2","source":"ALSA-2026:60394"},{"ecosystem":"AlmaLinux:10","fixed":["2.12.5-10.el10_2.3"],"introduced":["0"],"last_affected":[],"package":"libxml2-devel","purl":"pkg:rpm/almalinux/libxml2-devel","source":"ALSA-2026:60394"},{"ecosystem":"AlmaLinux:10","fixed":["2.12.5-10.el10_2.3"],"introduced":["0"],"last_affected":[],"package":"libxml2-static","purl":"pkg:rpm/almalinux/libxml2-static","source":"ALSA-2026:60394"},{"ecosystem":"AlmaLinux:10","fixed":["2.12.5-10.el10_2.3"],"introduced":["0"],"last_affected":[],"package":"python3-libxml2","purl":"pkg:rpm/almalinux/python3-libxml2","source":"ALSA-2026:60394"},{"ecosystem":"AlmaLinux:8","fixed":["2.9.7-21.el8_10.7"],"introduced":["0"],"last_affected":[],"package":"libxml2","purl":"pkg:rpm/almalinux/libxml2","source":"ALSA-2026:61248"},{"ecosystem":"AlmaLinux:8","fixed":["2.9.7-21.el8_10.7"],"introduced":["0"],"last_affected":[],"package":"libxml2-devel","purl":"pkg:rpm/almalinux/libxml2-devel","source":"ALSA-2026:61248"},{"ecosystem":"AlmaLinux:8","fixed":["2.9.7-21.el8_10.7"],"introduced":["0"],"last_affected":[],"package":"python3-libxml2","purl":"pkg:rpm/almalinux/python3-libxml2","source":"ALSA-2026:61248"},{"ecosystem":"Red Hat:enterprise_linux:10.2","fixed":["0:2.12.5-10.el10_2.3"],"introduced":["0"],"last_affected":[],"package":"libxml2","purl":"pkg:rpm/redhat/libxml2","source":"RHSA-2026:60394"},{"ecosystem":"Red Hat:enterprise_linux:10.2","fixed":["0:2.12.5-10.el10_2.3"],"introduced":["0"],"last_affected":[],"package":"libxml2-debuginfo","purl":"pkg:rpm/redhat/libxml2-debuginfo","source":"RHSA-2026:60394"},{"ecosystem":"Red Hat:enterprise_linux:10.2","fixed":["0:2.12.5-10.el10_2.3"],"introduced":["0"],"last_affected":[],"package":"libxml2-debugsource","purl":"pkg:rpm/redhat/libxml2-debugsource","source":"RHSA-2026:60394"},{"ecosystem":"Red Hat:enterprise_linux:10.2","fixed":["0:2.12.5-10.el10_2.3"],"introduced":["0"],"last_affected":[],"package":"libxml2-devel","purl":"pkg:rpm/redhat/libxml2-devel","source":"RHSA-2026:60394"},{"ecosystem":"Red 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Hat:enterprise_linux:8::baseos","fixed":["0:2.9.7-21.el8_10.7"],"introduced":["0"],"last_affected":[],"package":"libxml2-debuginfo","purl":"pkg:rpm/redhat/libxml2-debuginfo","source":"RHSA-2026:61248"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:2.9.7-21.el8_10.7"],"introduced":["0"],"last_affected":[],"package":"libxml2-debugsource","purl":"pkg:rpm/redhat/libxml2-debugsource","source":"RHSA-2026:61248"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:2.9.7-21.el8_10.7"],"introduced":["0"],"last_affected":[],"package":"python3-libxml2","purl":"pkg:rpm/redhat/python3-libxml2","source":"RHSA-2026:61248"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:2.9.7-21.el8_10.7"],"introduced":["0"],"last_affected":[],"package":"python3-libxml2-debuginfo","purl":"pkg:rpm/redhat/python3-libxml2-debuginfo","source":"RHSA-2026:61248"},{"ecosystem":"Red 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Linux:10","fixed":["0:2.12.5-10.el10_2.3"],"introduced":["0"],"last_affected":[],"package":"libxml2","purl":"pkg:rpm/rocky-linux/libxml2?distro=rocky-linux-10\u0026epoch=0","source":"RLSA-2026:60394"},{"ecosystem":"Rocky Linux:8","fixed":["0:2.9.7-21.el8_10.7"],"introduced":["0"],"last_affected":[],"package":"libxml2","purl":"pkg:rpm/rocky-linux/libxml2?distro=rocky-linux-8\u0026epoch=0","source":"RLSA-2026:61248"},{"ecosystem":"SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS","fixed":["2.9.14-150400.5.58.1"],"introduced":["0"],"last_affected":[],"package":"libxml2","purl":"pkg:rpm/suse/libxml2\u0026distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP4-ESPOS","source":"SUSE-SU-2026:3095-1"},{"ecosystem":"SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS","fixed":["2.9.14-150400.5.58.1"],"introduced":["0"],"last_affected":[],"package":"libxml2-python","purl":"pkg:rpm/suse/libxml2-python\u0026distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP4-ESPOS","source":"SUSE-SU-2026:3095-1"},{"ecosystem":"SUSE:Linux Enterprise High Performance Computing 15 SP4-LTSS","fixed":["2.9.14-150400.5.58.1"],"introduced":["0"],"last_affected":[],"package":"libxml2","purl":"pkg:rpm/suse/libxml2\u0026distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP4-LTSS","source":"SUSE-SU-2026:3095-1"},{"ecosystem":"SUSE:Linux Enterprise High Performance Computing 15 SP4-LTSS","fixed":["2.9.14-150400.5.58.1"],"introduced":["0"],"last_affected":[],"package":"libxml2-python","purl":"pkg:rpm/suse/libxml2-python\u0026distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP4-LTSS","source":"SUSE-SU-2026:3095-1"},{"ecosystem":"SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOS","fixed":["2.10.3-150500.5.41.1"],"introduced":["0"],"last_affected":[],"package":"libxml2","purl":"pkg:rpm/suse/libxml2\u0026distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP5-ESPOS","source":"SUSE-SU-2026:3096-1"},{"ecosystem":"SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOS","fixed":["2.10.3-150500.5.41.1"],"introduced":["0"],"last_affected":[],"package":"libxml2-python","purl":"pkg:rpm/suse/libxml2-python\u0026distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP5-ESPOS","source":"SUSE-SU-2026:3096-1"},{"ecosystem":"SUSE:Linux Enterprise High Performance Computing 15 SP5-LTSS","fixed":["2.10.3-150500.5.41.1"],"introduced":["0"],"last_affected":[],"package":"libxml2","purl":"pkg:rpm/suse/libxml2\u0026distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP5-LTSS","source":"SUSE-SU-2026:3096-1"},{"ecosystem":"SUSE:Linux Enterprise High Performance Computing 15 SP5-LTSS","fixed":["2.10.3-150500.5.41.1"],"introduced":["0"],"last_affected":[],"package":"libxml2-python","purl":"pkg:rpm/suse/libxml2-python\u0026distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP5-LTSS","source":"SUSE-SU-2026:3096-1"},{"ecosystem":"SUSE:Linux Enterprise Micro 5.3","fixed":["2.9.14-150400.5.58.1"],"introduced":["0"],"last_affected":[],"package":"libxml2","purl":"pkg:rpm/suse/libxml2\u0026distro=SUSE%20Linux%20Enterprise%20Micro%205.3","source":"SUSE-SU-2026:3095-1"},{"ecosystem":"SUSE:Linux Enterprise Micro 5.3","fixed":["2.9.14-150400.5.58.1"],"introduced":["0"],"last_affected":[],"package":"libxml2-python","purl":"pkg:rpm/suse/libxml2-python\u0026distro=SUSE%20Linux%20Enterprise%20Micro%205.3","source":"SUSE-SU-2026:3095-1"}],"prev":{"headline":"WP Post Author \u003c= 3.9.1 - Authenticated (Author+) SQL Injection","id":"CVE-2026-11977"},"products":["libxml2"],"published":"2026-06-29","related":[{"cvss_score":9.8,"headline":"XML external entity in n/a","id":"CVE-2017-16931","kev_date_added":null,"published":"2017-11-23"},{"cvss_score":9.1,"headline":"Information disclosure in n/a","id":"CVE-2017-8872","kev_date_added":null,"published":"2017-05-10"},{"cvss_score":8.1,"headline":"Use after free in libxml2","id":"CVE-2022-49043","kev_date_added":null,"published":"2025-01-26"},{"cvss_score":8,"headline":"Memory corruption in libxml2","id":"CVE-2026-86140","kev_date_added":null,"published":"2026-09-05"},{"cvss_score":7.5,"headline":"Memory corruption in n/a","id":"CVE-2024-34459","kev_date_added":null,"published":"2024-05-13"},{"cvss_score":7.5,"headline":"Use after free in n/a","id":"CVE-2024-25062","kev_date_added":null,"published":"2024-02-04"},{"cvss_score":7.5,"headline":"Nokogiri gem, via libxml, is affected by DoS vulnerabilities","id":"CVE-2017-16932","kev_date_added":null,"published":"2017-11-23"}],"sources":[{"class":"attribution","licence":"MIT","name":"AlmaLinux","prefix":"ALSA"},{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"Red Hat","prefix":"RHSA"},{"class":"attribution","licence":"BSD","name":"Rocky Linux","prefix":"RLSA"},{"class":"attribution","licence":"CC BY 4.0","name":"SUSE","prefix":"SUSE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-06-29","vendors":["xmlsoft"]},"summary":"Stack-based buffer overflow in libxml2's xmlcatalog utility allows arbitrary code execution or crashes when processing long input in shell mode.","url":"https://insights.sbomify.com/CVE-2026-11979/"}