{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-76781 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-76781 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, published on 17 Sep 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-2026-76781 and fix it if it is affected.\n\nWhat it is: CVE-2026-76781 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, published on 17 Sep 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-2026-76781 in the wild and no public exploit code.\n\nAffected product: Red Hat Enterprise Linux 10. 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-2026-76781/ (Markdown: https://insights.sbomify.com/CVE-2026-76781/index.md)","id":"CVE-2026-76781","markdown":"https://insights.sbomify.com/CVE-2026-76781/index.md","name":"CVE-2026-76781","record":{"aliases":["BELL-CVE-2026-76781","DEBIAN-CVE-2026-76781","ECHO-2007-775f-9d2b","GHSA-2j5r-8qjf-mq34","MGASA-2026-0558","RHSA-2026:57604","UBUNTU-CVE-2026-76781"],"analysis":{"component_type":"library","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"XML parsing library","requires_auth":"none","summary":"A local attacker can cause a denial of service by providing a crafted XML catalog with a missing attribute, crashing applications using libxml2.","user_interaction":"required","vuln_class":"null_dereference"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"redhat","cpe":[],"cvss":{"score":5.5,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-476","name":"NULL Pointer Dereference"}],"description":"A flaw was found in libxml2. A local user or an attacker providing a specially crafted XML catalog can trigger a NULL pointer dereference during XML catalog parsing. This occurs when a `nextCatalog` element lacks its mandatory `catalog` attribute, leading to the application crashing and causing a Denial of Service (DoS).","ecosystems":["Red Hat:hummingbird:1"],"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":"Libxml2: libxml2: null pointer dereference parsing nextcatalog without catalog attribute","id":"CVE-2026-76781","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"null_dereference","year":"2026"},"n_packages":5,"n_references":5,"next":{"headline":"Screenshot - Critical - Unsupported - SA-CONTRIB-2026-102","id":"CVE-2026-76782"},"packages":[{"ecosystem":"Red Hat:hummingbird:1","fixed":["0:2.15.3-0.1.3.hum1"],"introduced":["0"],"last_affected":[],"package":"libxml2","purl":"pkg:rpm/redhat/libxml2","source":"RHSA-2026:57604"},{"ecosystem":"Red Hat:hummingbird:1","fixed":["0:2.15.3-0.1.3.hum1"],"introduced":["0"],"last_affected":[],"package":"libxml2-16","purl":"pkg:rpm/redhat/libxml2-16","source":"RHSA-2026:57604"},{"ecosystem":"Red Hat:hummingbird:1","fixed":["0:2.15.3-0.1.3.hum1"],"introduced":["0"],"last_affected":[],"package":"libxml2-devel","purl":"pkg:rpm/redhat/libxml2-devel","source":"RHSA-2026:57604"},{"ecosystem":"Red Hat:hummingbird:1","fixed":["0:2.15.3-0.1.3.hum1"],"introduced":["0"],"last_affected":[],"package":"libxml2-static","purl":"pkg:rpm/redhat/libxml2-static","source":"RHSA-2026:57604"},{"ecosystem":"Red Hat:hummingbird:1","fixed":["0:2.15.3-0.1.3.hum1"],"introduced":["0"],"last_affected":[],"package":"python3-libxml2","purl":"pkg:rpm/redhat/python3-libxml2","source":"RHSA-2026:57604"}],"prev":{"headline":"BeyondSEO \u003c= 1.3.6 - Missing Authorization to Authenticated (Contributor+) Limited Privilege Escalation","id":"CVE-2026-76780"},"products":["Red Hat Enterprise Linux 10","Red Hat Enterprise Linux 6","Red Hat Enterprise Linux 7","Red Hat Enterprise Linux 8","Red Hat Enterprise Linux 9","Red Hat Hardened Images","Red Hat OpenShift Container Platform 4"],"published":"2026-09-17","related":[],"sources":[{"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":"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":"2026-09-24","vendors":["Red Hat"]},"summary":"A local attacker can cause a denial of service by providing a crafted XML catalog with a missing attribute, crashing applications using libxml2.","url":"https://insights.sbomify.com/CVE-2026-76781/"}