CVE•Published 2026-03-06•Modified 2026-07-02•1 article on news•7 live references•NVD data
CVE-2026-29063Immutable-js · Immutable
Vulnerability data via NVD (ingested)
CVSS v3.1
9.8
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS percentile
58
Exploit Prediction Scoring System · top 42% of all CVEs
Weaknesses (CWE)
Description
Immutable.js provides many Persistent Immutable data structures. Prior to versions 3.8.3, 4.3.7, and 5.1.5, Prototype Pollution is possible in immutable via the mergeDeep(), mergeDeepWith(), merge(), Map.toJS(), and Map.toObject() APIs. This issue has been patched in versions 3.8.3, 4.3.7, and 5.1.5.
Timeline
Published 2026-03-06
Modified 2026-07-02
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag0 hosts
vuln:CVE-2026-29063Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Immutable-js Immutable"All exposed Immutable-js Immutable instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Immutable"HTTP body or banner mentions "Immutable" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2026-29063Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-29063Censys host search filtered to this CVE id.
grep.app
CVE-2026-29063Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-29063GitHub code search for direct mentions.
Google dork
"CVE-2026-29063" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2026-29063 on GitHub.