{"answers":{"affected":"2 open source packages ship an affected version, including @nyariv/sandboxjs. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-25587 exists.","fix":"Upgrade @nyariv/sandboxjs to 0.8.29 or later.","what":"CVE-2026-25587 is a critical code injection vulnerability in nyariv SandboxJS, published on 6 Feb 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-2026-25587 and fix it if it is affected.\n\nWhat it is: CVE-2026-25587 is a critical code injection vulnerability in nyariv SandboxJS, published on 6 Feb 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-2026-25587 exists.\n\nAffected packages and fixed versions:\n- @nyariv/sandboxjs (npm): affected all versions; fixed in 0.8.29\n- @nyariv/sandboxjs (npm): affected all versions; fixed in 0.8.29\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-2026-25587/ (Markdown: https://insights.sbomify.com/CVE-2026-25587/index.md)","id":"CVE-2026-25587","markdown":"https://insights.sbomify.com/CVE-2026-25587/index.md","name":"CVE-2026-25587","record":{"aliases":["GHSA-66h4-qj4x-38xp"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"JavaScript sandboxing library","requires_auth":"none","summary":"Attackers can escape the SandboxJS sandbox by overwriting Map.prototype.has, leading to arbitrary code execution.","user_interaction":"not_required","vuln_class":"code_injection"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"sandboxjs","vendor":"nyariv"}],"cvss":{"score":10,"severity":"critical","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-94","name":"Improper Control of Generation of Code"}],"description":"SandboxJS is a JavaScript sandboxing library. Prior to 0.8.29, as Map is in SAFE_PROTOYPES, it's prototype can be obtained via Map.prototype. By overwriting Map.prototype.has the sandbox can be escaped. This vulnerability is fixed in 0.8.29.","ecosystems":["npm"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"SandboxJS has a Sandbox Escape","id":"CVE-2026-25587","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"code_injection","year":"2026"},"n_packages":2,"n_references":2,"next":{"headline":"RedisTimeSeries RESTORE invalid memory access may allow remote code execution","id":"CVE-2026-25588"},"packages":[{"ecosystem":"npm","fixed":["0.8.29"],"introduced":["0"],"last_affected":[],"package":"@nyariv/sandboxjs","purl":null,"source":"GHSA-66h4-qj4x-38xp"},{"ecosystem":"npm","fixed":["0.8.29"],"introduced":["0"],"last_affected":[],"package":"@nyariv/sandboxjs","purl":"pkg:npm/%40nyariv/sandboxjs","source":"GHSA-66h4-qj4x-38xp"}],"prev":{"headline":"SandboxJS has a Sandbox Escape via Prototype Whitelist Bypass and Host Prototype Pollution","id":"CVE-2026-25586"},"products":["SandboxJS"],"published":"2026-02-06","related":[{"cvss_score":10,"headline":"SandboxJS: Sandbox escape via Function.caller leakage of internal call op","id":"CVE-2026-43898","kev_date_added":null,"published":"2026-05-28"},{"cvss_score":10,"headline":"SandboxJS: Sandbox integrity escape","id":"CVE-2026-34208","kev_date_added":null,"published":"2026-04-06"},{"cvss_score":10,"headline":"SandboxJS has a Sandbox Escape","id":"CVE-2026-26954","kev_date_added":null,"published":"2026-03-13"},{"cvss_score":10,"headline":"SandboxJS has a Sandbox Escape","id":"CVE-2026-25520","kev_date_added":null,"published":"2026-02-06"},{"cvss_score":10,"headline":"SandboxJS has a Sandbox Escape via Prototype Whitelist Bypass and Host Prototype Pollution","id":"CVE-2026-25586","kev_date_added":null,"published":"2026-02-06"},{"cvss_score":10,"headline":"SandboxJS has a sandbox escape via TOCTOU bug on keys in property accesses","id":"CVE-2026-25641","kev_date_added":null,"published":"2026-02-06"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"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":"poc","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-02-06","vendors":["nyariv"]},"summary":"Attackers can escape the SandboxJS sandbox by overwriting Map.prototype.has, leading to arbitrary code execution.","url":"https://insights.sbomify.com/CVE-2026-25587/"}