CVE•Published 2020-11-16•Modified 2026-10-07•1 article on news•6 live references•NVD data
CVE-2020-26217Xstream · Xstream
Vulnerability data via NVD (ingested)
CVSS v3.1
8.0
HIGH
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H
EPSS percentile
100
Exploit Prediction Scoring System · top 0% of all CVEs
Weaknesses (CWE)
Description
XStream before version 1.4.14 is vulnerable to Remote Code Execution.The vulnerability may allow a remote attacker to run arbitrary shell commands only by manipulating the processed input stream. Only users who rely on blocklists are affected. Anyone using XStream's Security Framework allowlist is not affected. The linked advisory provides code workarounds for users who cannot upgrade. The issue is fixed in version 1.4.14.
Timeline
Published 2020-11-16
Modified 2026-10-07
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 tag9 hosts
vuln:CVE-2020-26217Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Xstream Xstream"All exposed Xstream Xstream instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Xstream"HTTP body or banner mentions "Xstream" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2020-26217Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2020-26217Censys host search filtered to this CVE id.
grep.app
CVE-2020-26217Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2020-26217GitHub code search for direct mentions.
Google dork
"CVE-2020-26217" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.