{"answers":{"affected":"","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-91939 exists.","fix":"No fix has been published for CVE-2026-91939 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-91939 is a critical unsafe deserialization vulnerability in Cotonti, published on 15 Sep 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-2026-91939 and fix it if it is affected.\n\nWhat it is: CVE-2026-91939 is a critical unsafe deserialization vulnerability in Cotonti, published on 15 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-91939 exists.\n\nAffected product: Cotonti. 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-2026-91939/ (Markdown: https://insights.sbomify.com/CVE-2026-91939/index.md)","id":"CVE-2026-91939","markdown":"https://insights.sbomify.com/CVE-2026-91939/index.md","name":"CVE-2026-91939","record":{"aliases":["GHSA-xv9c-9hwm-jp8g"],"analysis":{"component_type":"cms_plugin","fix_type":"patch","impacts":["code_execution","data_modify"],"network_reachable":"yes","non_default_config":false,"product_category":"Cotonti Comments Plugin","requires_auth":"none","summary":"Unauthenticated attackers can achieve code execution or database manipulation via PHP object injection in the Cotonti Comments plugin.","user_interaction":"not_required","vuln_class":"deserialization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":9.3,"severity":"critical","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-502","name":"Deserialization of Untrusted Data"}],"description":"Cotonti 1.0.0 Comments plugin passes the ci GET parameter to unserialize() without allowed_classes restriction, allowing unauthenticated attackers to instantiate arbitrary PHP classes with attacker-controlled properties. Attackers can exploit PHP object injection through crafted serialized payloads to trigger gadget chains and achieve database manipulation or code execution.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":false,"headline":"Cotonti 1.0.0 Comments Plugin PHP Object Injection via ci Parameter","id":"CVE-2026-91939","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"deserialization","year":"2026"},"n_packages":0,"n_references":7,"next":{"headline":"crawl4ai before 0.9.3 Arbitrary File Write via PDFContentScrapingStrategy","id":"CVE-2026-91940"},"packages":[],"prev":{"headline":"Flowise before 3.1.4 Server-Side Request Forgery via document loaders","id":"CVE-2026-91938"},"products":["Cotonti"],"published":"2026-09-15","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":"total"},"state":"PUBLISHED","updated":"2026-09-24","vendors":["Cotonti"]},"summary":"Unauthenticated attackers can achieve code execution or database manipulation via PHP object injection in the Cotonti Comments plugin.","url":"https://insights.sbomify.com/CVE-2026-91939/"}