{"answers":{"affected":"","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-115506 exists.","fix":"Upgrade to a fixed version.","what":"CVE-2026-115506 is a high-severity vulnerability in libexpat, published on 22 Oct 2026."},"fix_prompt":"Check this codebase for CVE-2026-115506 and fix it if it is affected.\n\nWhat it is: CVE-2026-115506 is a high-severity vulnerability in libexpat, published on 22 Oct 2026. \nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-115506 exists.\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-2026-115506/ (Markdown: https://insights.sbomify.com/CVE-2026-115506/index.md)","id":"CVE-2026-115506","markdown":"https://insights.sbomify.com/CVE-2026-115506/index.md","name":"CVE-2026-115506","record":{"aliases":["AZL-110546","AZL-111014","DEBIAN-CVE-2026-115506","ECHO-77e5-0c9b-7930","GHSA-j83x-34mv-v962","ROOT-OS-DEBIAN-13-CVE-2026-115506","UBUNTU-CVE-2026-115506"],"analysis":null,"analysis_generated_by":null,"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-776","name":"Improper Restriction of Recursive Entity References in DTDs"}],"description":"libexpat through 2.9.0 contains a denial of service vulnerability because billion laughs protection in accountingDiffTolerated() in xmlparse.c detects entity amplification too late. Attackers can supply a moderately sized XML document with a large DTD and nested entity expansions to consume tens of seconds of CPU per parse.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"libexpat through 2.9.0 Denial of Service via Billion Laughs Detection Delay","id":"CVE-2026-115506","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":null,"year":"2026"},"n_packages":0,"n_references":5,"next":{"headline":"Vikunja 2.2.0 before 2.7.1 HTML Injection via Notification Email Header","id":"CVE-2026-115507"},"packages":[],"prev":{"headline":"libsmb2 before 6.3 Integer Overflow in DCE/RPC NDR Decoder via NetrShareEnum","id":"CVE-2026-115505"},"products":["libexpat"],"published":"2026-10-22","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":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-10-23","vendors":["libexpat"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-115506/"}