CVE-2020-26217
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.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 82.7%, higher than 100% of all known CVEs. Patch or mitigate before the next change window.
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.
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 82.72% probability · 100th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-78
- Affected
- xstream/xstream · debian/debian linux · netapp/snapmanager · apache/activemq · oracle/banking cash management · oracle/banking corporate lending process management · oracle/banking credit facilities process management · oracle/banking platform · oracle/banking supply chain finance · oracle/banking trade finance process management · oracle/banking virtual account management · oracle/business activity monitoring · oracle/communications policy management · oracle/endeca information discovery studio · oracle/retail xstore point of service
- Source
- security-advisories@github.com
EPSS moved from 82.7% on 22 October 2026 to 82.7% on 3 November 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
References
- 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
- 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
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.