{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-76641 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-76641 is a high-severity memory corruption vulnerability in libexpat, published on 20 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-76641 and fix it if it is affected.\n\nWhat it is: CVE-2026-76641 is a high-severity memory corruption vulnerability in libexpat, published on 20 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-76641 in the wild and no public exploit code.\n\nAffected product: libexpat. 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-2026-76641/ (Markdown: https://insights.sbomify.com/CVE-2026-76641/index.md)","id":"CVE-2026-76641","markdown":"https://insights.sbomify.com/CVE-2026-76641/index.md","name":"CVE-2026-76641","record":{"aliases":["ALPINE-CVE-2026-76641","AZL-96932","BELL-CVE-2026-76641","CLSA-2026-1791324825","CLSA-2026-1791325909","CLSA-2026-1791326154","ECHO-0ffe-8d46-73ca","GHSA-r6r4-8m79-7vvv","UBUNTU-CVE-2026-76641"],"analysis":{"component_type":"library","fix_type":"patch","impacts":["denial_of_service","code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"XML parsing library","requires_auth":"none","summary":"Attackers can trigger memory corruption and denial of service in libexpat by processing malicious XML with external entity parsers.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":8.7,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-125","name":"Out-of-bounds Read"}],"description":"Expat through 2.8.3 contains an out-of-bounds read vulnerability that allows attackers to trigger memory corruption by processing XML with external entity parsers created via XML_ExternalEntityParserCreate. A struct size mismatch between ELEMENT_TYPE members causes storeAtts to read the attIndex member past allocated memory boundaries, resulting in failure to normalize whitespace in non-CDATA attributes or a wild pointer dereference causing a segfault. This vulnerability was introduced by the fix for CVE-2026-66046.","ecosystems":[],"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":"Expat Out-of-Bounds Read via dtdCopy","id":"CVE-2026-76641","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"memory_corruption","year":"2026"},"n_packages":0,"n_references":3,"next":{"headline":"util-linux libmount Privilege Escalation via Failed Mount Helper","id":"CVE-2026-76642"},"packages":[],"prev":{"headline":"Unitree G1 EDU 1.5.2 BLE GATT RCE via WiFi Provisioning Stack","id":"CVE-2026-76640"},"products":["libexpat"],"published":"2026-08-20","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-10-01","vendors":["libexpat"]},"summary":"Attackers can trigger memory corruption and denial of service in libexpat by processing malicious XML with external entity parsers.","url":"https://insights.sbomify.com/CVE-2026-76641/"}