HOMEVULNERABILITIESCVE-2020-26217
HIGH

CVE-2020-26217

CWE-78Published: November 16, 2020· Updated: Jun 17, 2026

8.8
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2020-26217 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

Apache1 product(s)
activemq
Debian1 product(s)
debian linux
netapp1 product(s)
snapmanager
Oracle11 product(s)
banking cash managementbanking corporate lending process managementbanking credit facilities process managementbanking platformbanking supply chain financebanking trade finance process managementbanking virtual account managementbusiness activity monitoringcommunications policy managementendeca information discovery studioretail xstore point of service
xstream1 product(s)
xstream
Source: NVD CPE · 37 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/x-stream/xstream/commit/0fec095d534126931c99fd38e9c6d41f5c685c1a
PATCHhttps://www.oracle.com//security-alerts/cpujul2021.html
PATCHhttps://www.oracle.com/security-alerts/cpuApr2021.html
PATCHhttps://www.oracle.com/security-alerts/cpuoct2021.html
PATCHhttps://github.com/x-stream/xstream/commit/0fec095d534126931c99fd38e9c6d41f5c685c1a
PATCHhttps://www.oracle.com//security-alerts/cpujul2021.html
PATCHhttps://www.oracle.com/security-alerts/cpuApr2021.html
PATCHhttps://www.oracle.com/security-alerts/cpuoct2021.html
ADVISORYhttps://github.com/x-stream/xstream/security/advisories/GHSA-mw36-7c6c-q4q2
ADVISORYhttps://lists.debian.org/debian-lts-announce/2020/12/msg00001.html
ADVISORYhttps://security.netapp.com/advisory/ntap-20210409-0004/
ADVISORYhttps://www.debian.org/security/2020/dsa-4811
ADVISORYhttps://www.oracle.com/security-alerts/cpuapr2022.html
ADVISORYhttps://www.oracle.com/security-alerts/cpujan2022.html
ADVISORYhttps://x-stream.github.io/CVE-2020-26217.html
ADVISORYhttps://github.com/x-stream/xstream/security/advisories/GHSA-mw36-7c6c-q4q2
ADVISORYhttps://lists.debian.org/debian-lts-announce/2020/12/msg00001.html
ADVISORYhttps://security.netapp.com/advisory/ntap-20210409-0004/
ADVISORYhttps://www.debian.org/security/2020/dsa-4811
ADVISORYhttps://www.oracle.com/security-alerts/cpuapr2022.html
ADVISORYhttps://www.oracle.com/security-alerts/cpujan2022.html
ADVISORYhttps://x-stream.github.io/CVE-2020-26217.html

All References (30)

→
https://github.com/x-stream/xstream/commit/0fec095d534126931c99fd38e9c6d41f5c685c1aPatch · Third Party Advisory
→
https://github.com/x-stream/xstream/security/advisories/GHSA-mw36-7c6c-q4q2Mitigation · Third Party Advisory
→
https://lists.apache.org/thread.html/r2de526726e7f4db4a7cb91b7355070779f51a84fd985c6529c2f4e9e%40%3Cissues.activemq.apache.org%3EIssue Tracking · Mailing List
→
https://lists.apache.org/thread.html/r7c9fc255edc0b9cd9567093d131f6d33fde4c662aaf912460ef630e9%40%3Ccommits.camel.apache.org%3EIssue Tracking · Mailing List
→
https://lists.apache.org/thread.html/r826a006fda71cc96fc87b6eca4b5d195f19a292ad36cea501682c38c%40%3Cissues.activemq.apache.org%3EIssue Tracking · Mailing List
→
https://lists.apache.org/thread.html/redde3609b89b2a4ff18b536a06ef9a77deb93d47fda8ed28086fa8c3%40%3Cissues.activemq.apache.org%3EIssue Tracking · Mailing List
→
https://lists.debian.org/debian-lts-announce/2020/12/msg00001.htmlMailing List · Third Party Advisory
→
https://security.netapp.com/advisory/ntap-20210409-0004/Third Party Advisory
→
https://www.debian.org/security/2020/dsa-4811Third Party Advisory
→
https://www.oracle.com//security-alerts/cpujul2021.htmlPatch · Third Party Advisory
→
https://www.oracle.com/security-alerts/cpuApr2021.htmlPatch · Third Party Advisory
→
https://www.oracle.com/security-alerts/cpuapr2022.htmlNot Applicable · Third Party Advisory
→
https://www.oracle.com/security-alerts/cpujan2022.htmlNot Applicable · Third Party Advisory
→
https://www.oracle.com/security-alerts/cpuoct2021.htmlPatch · Third Party Advisory
→
https://x-stream.github.io/CVE-2020-26217.htmlExploit · Mitigation · Vendor Advisory

Quick Facts

CVE IDCVE-2020-26217
CVSS Score8.8 / 10
SeverityHIGH
WeaknessCWE-78
CISA KEVNo
Affected5 vendor(s)
PublishedNov 16, 2020

Related CVEs (CWE-78)

CVE-2011-0271
10.0
CVE-2011-0372
10.0
CVE-2010-2445
10.0
CVE-2010-3757
10.0
CVE-2010-3754
10.0
CVE-2011-0381
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-26217 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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