{"answers":{"affected":"2 open source packages ship an affected version, including seroval. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-23736 in the wild and no public exploit code.","fix":"Upgrade seroval to 1.4.1 or later.","what":"CVE-2026-23736 is a high-severity unsafe deserialization vulnerability in lxsmnsyc seroval, published on 21 Jan 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-2026-23736 and fix it if it is affected.\n\nWhat it is: CVE-2026-23736 is a high-severity unsafe deserialization vulnerability in lxsmnsyc seroval, published on 21 Jan 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-2026-23736 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- seroval (npm): affected all versions; fixed in 1.4.1\n- seroval (npm): affected all versions; fixed in 1.4.1\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-2026-23736/ (Markdown: https://insights.sbomify.com/CVE-2026-23736/index.md)","id":"CVE-2026-23736","markdown":"https://insights.sbomify.com/CVE-2026-23736/index.md","name":"CVE-2026-23736","record":{"aliases":["GHSA-hj76-42vx-jwp4"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution","privilege_escalation"],"network_reachable":"yes","non_default_config":false,"product_category":"JavaScript serialization library","requires_auth":"none","summary":"Attackers can achieve prototype pollution and potential code execution via malicious JSON keys in the seroval library.","user_interaction":"not_required","vuln_class":"deserialization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"seroval","vendor":"lxsmnsyc"}],"cvss":{"score":7.3,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","version":"3.1"},"cwes":[{"id":"CWE-1321","name":"Improperly Controlled Modification of Object Prototype Attributes"}],"description":"seroval facilitates JS value stringification, including complex structures beyond JSON.stringify capabilities. In versions 1.4.0 and below, due to improper input validation, a malicious object key can lead to prototype pollution during JSON deserialization. This vulnerability affects only JSON deserialization functionality. This issue is fixed in version 1.4.1.","ecosystems":["npm"],"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":"seroval Affected by Prototype Pollution via JSON Deserialization","id":"CVE-2026-23736","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"deserialization","year":"2026"},"n_packages":2,"n_references":2,"next":{"headline":"seroval Affected by Remote Code Execution via JSON Deserialization","id":"CVE-2026-23737"},"packages":[{"ecosystem":"npm","fixed":["1.4.1"],"introduced":["0"],"last_affected":[],"package":"seroval","purl":null,"source":"GHSA-hj76-42vx-jwp4"},{"ecosystem":"npm","fixed":["1.4.1"],"introduced":["0"],"last_affected":[],"package":"seroval","purl":"pkg:npm/seroval","source":"GHSA-hj76-42vx-jwp4"}],"prev":{"headline":"Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') in graphql-modules","id":"CVE-2026-23735"},"products":["seroval"],"published":"2026-01-21","related":[{"cvss_score":7.5,"headline":"seroval affected by Denial of Service via RegExp serialization","id":"CVE-2026-23956","kev_date_added":null,"published":"2026-01-22"},{"cvss_score":7.5,"headline":"seroval is vulnerable to Denial of Service via array serialization","id":"CVE-2026-23957","kev_date_added":null,"published":"2026-01-22"},{"cvss_score":7.5,"headline":"Seroval affected by Denial of Service via Deeply Nested Objects","id":"CVE-2026-24006","kev_date_added":null,"published":"2026-01-22"},{"cvss_score":7.5,"headline":"seroval Affected by Remote Code Execution via JSON Deserialization","id":"CVE-2026-23737","kev_date_added":null,"published":"2026-01-21"}],"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":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-01-22","vendors":["lxsmnsyc"]},"summary":"Attackers can achieve prototype pollution and potential code execution via malicious JSON keys in the seroval library.","url":"https://insights.sbomify.com/CVE-2026-23736/"}