{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-9516 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2026-9516 is a high-severity denial of service vulnerability in RURBAN Cpanel::JSON::XS, published on 3 Jun 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-2026-9516 and fix it if it is affected.\n\nWhat it is: CVE-2026-9516 is a high-severity denial of service vulnerability in RURBAN Cpanel::JSON::XS, published on 3 Jun 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-2026-9516 in the wild and no public exploit code.\n\nAffected product: RURBAN Cpanel::JSON::XS. 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-2026-9516/ (Markdown: https://insights.sbomify.com/CVE-2026-9516/index.md)","id":"CVE-2026-9516","markdown":"https://insights.sbomify.com/CVE-2026-9516/index.md","name":"CVE-2026-9516","record":{"aliases":["AZL-89399","DEBIAN-CVE-2026-9516","GHSA-32gp-2g42-v9vc","UBUNTU-CVE-2026-9516"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Perl JSON library","requires_auth":"none","summary":"Attackers can crash Perl applications using Cpanel::JSON::XS by sending UTF-8 BOM prefixed JSON that triggers a filter callback exception.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"CPANSec","cpe":[{"product":"cpanel\\","vendor":"rurban"}],"cvss":{"score":7.5,"severity":"high","source":"cisa-adp","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-763","name":"Release of Invalid Pointer or Reference"},{"id":"CWE-755","name":"Improper Handling of Exceptional Conditions"}],"description":"Cpanel::JSON::XS versions before 4.41 for Perl allow denial of service via UTF-8 BOM prefixed input when a decode filter callback throws.\n\nTo skip a leading 3-byte UTF-8 BOM, decode_json() advances the input scalar's string pointer past the mark with SvPV_set() and restores it only on the normal return path. When decoding aborts through a Perl exception, for example a filter_json_object callback that croaks, the restore is skipped and the scalar is left with its string pointer offset into its own buffer and a shortened length.\n\nWhen that scalar is later freed, the allocator receives an invalid pointer and the interpreter aborts. A single BOM prefixed document decoded with a throwing filter callback crashes any caller.","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":"Denial of service in Cpanel::JSON::XS","id":"CVE-2026-9516","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"hemant6488 CodeIgniter-StudentManagementSystem Student Management addStudentView access control","id":"CVE-2026-9517"},"packages":[],"prev":{"headline":"Totolink CA750-PoE Setting cstecgi.cgi setUnloadUserData os command injection","id":"CVE-2026-9515"},"products":["Cpanel::JSON::XS"],"published":"2026-06-03","related":[{"cvss_score":9.1,"headline":"Information disclosure in n/a","id":"CVE-2022-48623","kev_date_added":null,"published":"2024-02-13"},{"cvss_score":7.3,"headline":"Memory corruption in Cpanel::JSON::XS","id":"CVE-2026-9334","kev_date_added":null,"published":"2026-06-03"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"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":"2026-06-03","vendors":["RURBAN"]},"summary":"Attackers can crash Perl applications using Cpanel::JSON::XS by sending UTF-8 BOM prefixed JSON that triggers a filter callback exception.","url":"https://insights.sbomify.com/CVE-2026-9516/"}