{"answers":{"affected":"1 open source package ship an affected version, including htmlunit.","exploited":"There is no known exploitation of OSV-2026-535 in the wild and no public exploit code.","fix":"No fix has been published for OSV-2026-535 yet. Limit exposure of the affected software until one is available.","what":"OSV-2026-535 is a denial of service vulnerability in htmlunit, published on 5 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for OSV-2026-535 and fix it if it is affected.\n\nWhat it is: OSV-2026-535 is a denial of service vulnerability in htmlunit, published on 5 Apr 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 OSV-2026-535 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- htmlunit (OSS-Fuzz): affected all versions; no fix listed\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/OSV-2026-535/ (Markdown: https://insights.sbomify.com/OSV-2026-535/index.md)","id":"OSV-2026-535","markdown":"https://insights.sbomify.com/OSV-2026-535/index.md","name":"OSV-2026-535","record":{"aliases":[],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"HTML parsing library","requires_auth":"none","summary":"A security exception in the HTMLTagBalancer component can cause a denial of service when processing malformed HTML input.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=499447433\n\n```\nCrash type: Security exception\nCrash state:\norg.htmlunit.cyberneko.HTMLTagBalancer.endElement\njava.base/sun.nio.cs.CESU_8.updatePositions\njava.base/sun.nio.cs.CESU_8$Encoder.encodeArrayLoop\n```","ecosystems":["OSS-Fuzz"],"exploits":{"exploitdb":null,"first_seen":null,"github_poc":null,"max_poc_stars":null,"metasploit":null,"nuclei":null,"refs":[],"tier":null},"has_fix":false,"headline":"Security exception in org.htmlunit.cyberneko.HTMLTagBalancer.endElement","id":"OSV-2026-535","indexable":true,"kev":null,"kind":"advisory","links":{"ecosystem":"OSS-Fuzz","product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":1,"n_references":null,"packages":[{"ecosystem":"OSS-Fuzz","fixed":[],"introduced":[],"last_affected":[],"package":"htmlunit","purl":"pkg:generic/htmlunit","source":"OSV-2026-535"}],"products":null,"published":"2026-04-05","related":[],"sources":[{"class":"attribution","licence":"CC BY 4.0","name":"OSS-Fuzz","prefix":"OSV"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":null,"updated":null,"vendors":null},"summary":"A security exception in the HTMLTagBalancer component can cause a denial of service when processing malformed HTML input.","url":"https://insights.sbomify.com/OSV-2026-535/"}