{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-71981 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-71981 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-71981 is a high-severity unsafe deserialization vulnerability in cypht-org cypht, published on 1 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-71981 and fix it if it is affected.\n\nWhat it is: CVE-2026-71981 is a high-severity unsafe deserialization vulnerability in cypht-org cypht, published on 1 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-71981 in the wild and no public exploit code.\n\nAffected product: cypht-org cypht. 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-2026-71981/ (Markdown: https://insights.sbomify.com/CVE-2026-71981/index.md)","id":"CVE-2026-71981","markdown":"https://insights.sbomify.com/CVE-2026-71981/index.md","name":"CVE-2026-71981","record":{"aliases":["GHSA-46j6-w3hw-4r9x"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Cypht webmail","requires_auth":"low_privilege","summary":"Authenticated attackers can achieve remote code execution by injecting a crafted PHP object into the back_query parameter of the logout handler.","user_interaction":"not_required","vuln_class":"deserialization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":8.7,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/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":"Cypht before 2.12.2 contains a PHP object injection vulnerability that allows authenticated attackers to execute arbitrary operating system commands by supplying a crafted PHP object graph in the back_query GET parameter of the logout handler. Attackers can pass a base64-encoded serialized payload through this parameter, which is decoded and passed directly to unserialize() without an allow-list, signature check, or type restriction, enabling gadget-chain exploitation to achieve remote code execution as the web server process.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":"2026-09-02","github_poc":1,"max_poc_stars":0,"metasploit":0,"nuclei":0,"refs":[{"date":"2026-09-02T13:33:59Z","kind":"github_poc","ref":"https://github.com/lyn4r/CVE-2026-71981","stars":0,"title":"Cypht CVE-2026-71981 PoC"}],"tier":"poc_unverified"},"has_fix":false,"headline":"Cypht \u003c 2.12.2 PHP Object Injection RCE via back_query Parameter","id":"CVE-2026-71981","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"deserialization","year":"2026"},"n_packages":0,"n_references":4,"next":{"headline":"This CVE ID has been rejected or withdrawn by its CVE Numbering Authority.","id":"CVE-2026-71982"},"packages":[],"prev":{"headline":"Belledonne Communications bcg729 1.1.2 Out-of-Bounds Read via decodeSIDframe()","id":"CVE-2026-71980"},"products":["cypht"],"published":"2026-09-01","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)"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-09-02","vendors":["cypht-org"]},"summary":"Authenticated attackers can achieve remote code execution by injecting a crafted PHP object into the back_query parameter of the logout handler.","url":"https://insights.sbomify.com/CVE-2026-71981/"}