{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-118370 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2026-118370 is a high-severity vulnerability in libexpat, published on 28 Oct 2026."},"fix_prompt":"Check this codebase for CVE-2026-118370 and fix it if it is affected.\n\nWhat it is: CVE-2026-118370 is a high-severity vulnerability in libexpat, published on 28 Oct 2026. \nExploitation: There is no known exploitation of CVE-2026-118370 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-2026-118370/ (Markdown: https://insights.sbomify.com/CVE-2026-118370/index.md)","id":"CVE-2026-118370","markdown":"https://insights.sbomify.com/CVE-2026-118370/index.md","name":"CVE-2026-118370","record":{"aliases":["AZL-111148","DEBIAN-CVE-2026-118370","ECHO-716b-5eac-638d","GHSA-c6pw-vjr4-wwwr","UBUNTU-CVE-2026-118370"],"analysis":null,"analysis_generated_by":null,"assigner":"VulnCheck","cpe":[],"cvss":{"score":8.2,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-190","name":"Integer Overflow or Wraparound"}],"description":"libexpat through 2.9.0 contains a signed integer overflow vulnerability in storeAtts() in lib/xmlparse.c that allows attackers to trigger out-of-bounds writes via oversized attribute counts. Attackers can supply a multi-gigabyte document with a start tag carrying over 2^30 attributes to overflow attIndex and nPrefixes, crashing applications or corrupting heap memory.","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":"libexpat through 2.9.0 Integer Overflow in storeAtts via attIndex and nPrefixes","id":"CVE-2026-118370","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":null,"year":"2026"},"n_packages":0,"n_references":6,"next":{"headline":"LibreSSL through 4.4.0 CRLF Injection via OCSP_sendreq_new() Request Line","id":"CVE-2026-118371"},"packages":[],"prev":{"headline":"Memory corruption in V8 in Google Chrome prior to 156.0.8078.73 allowed a remote attacker to potentially execute arbitrary code inside the s","id":"CVE-2026-118359"},"products":["libexpat"],"published":"2026-10-28","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":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-10-28","vendors":["libexpat"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-118370/"}