{"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-2026-34211 exists.","fix":"Upgrade @nyariv/sandboxjs to 0.8.36 or later.","what":"CVE-2026-34211 is a medium-severity denial of service vulnerability in nyariv SandboxJS, published on 6 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 CVE-2026-34211 and fix it if it is affected.\n\nWhat it is: CVE-2026-34211 is a medium-severity denial of service vulnerability in nyariv SandboxJS, published on 6 Apr 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-2026-34211 exists.\n\nAffected packages and fixed versions:\n- @nyariv/sandboxjs (npm): affected all versions; fixed in 0.8.36\n- @nyariv/sandboxjs (npm): affected all versions; fixed in 0.8.36\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-2026-34211/ (Markdown: https://insights.sbomify.com/CVE-2026-34211/index.md)","id":"CVE-2026-34211","markdown":"https://insights.sbomify.com/CVE-2026-34211/index.md","name":"CVE-2026-34211","record":{"aliases":["GHSA-8pfc-jjgw-6g26"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"JavaScript sandboxing library","requires_auth":"none","summary":"An attacker can crash Node.js processes using SandboxJS by supplying deeply nested expressions, causing a stack overflow.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"sandboxjs","vendor":"nyariv"}],"cvss":{"score":6.9,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-674","name":"Uncontrolled Recursion"}],"description":"SandboxJS is a JavaScript sandboxing library. Prior to 0.8.36, the @nyariv/sandboxjs parser contains unbounded recursion in the restOfExp function and the lispify/lispifyExpr call chain. An attacker can crash any Node.js process that parses untrusted input by supplying deeply nested expressions (e.g., ~2000 nested parentheses), causing a RangeError: Maximum call stack size exceeded that terminates the process. This vulnerability is fixed in 0.8.36.","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: Stack overflow DoS via deeply nested expressions in recursive descent parser","id":"CVE-2026-34211","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":2,"n_references":1,"next":{"headline":"Docmost page content has stored XSS via unsanitized attachment URLs","id":"CVE-2026-34212"},"packages":[{"ecosystem":"npm","fixed":["0.8.36"],"introduced":["0"],"last_affected":[],"package":"@nyariv/sandboxjs","purl":null,"source":"GHSA-8pfc-jjgw-6g26"},{"ecosystem":"npm","fixed":["0.8.36"],"introduced":["0"],"last_affected":[],"package":"@nyariv/sandboxjs","purl":"pkg:npm/%40nyariv/sandboxjs","source":"GHSA-8pfc-jjgw-6g26"}],"prev":{"headline":"mppx has Stripe charge credential replay via missing idempotency check","id":"CVE-2026-34210"},"products":["SandboxJS"],"published":"2026-04-06","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","id":"CVE-2026-25587","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":"partial"},"state":"PUBLISHED","updated":"2026-04-07","vendors":["nyariv"]},"summary":"An attacker can crash Node.js processes using SandboxJS by supplying deeply nested expressions, causing a stack overflow.","url":"https://insights.sbomify.com/CVE-2026-34211/"}