CVE-2020-26217
HIGH 9.3EPSS 85.0%
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 v3.1
- 8.8 HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - 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 - 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 - CVSS v2.0
- 9.3 HIGH
AV:N/AC:M/Au:N/C:C/I:C/A:C - EPSS
- 85.00% chance of exploitation in the next 30 days, 100th percentile
- Nuclei
- high · CWE-78
- Published
- 2020-11-16
- Updated
- 2024-08-04
Proof-of-concept exploits (8)
- Al1ex/CVE-2020-262173★ · 2021-01-22
- Veraxy00/XStream-vul-poc4★ · 2020-12-15
- cuijiung/xstream-CVE-2020-262170★ · 2025-07-17
- hex0wn/learn-java-bug74★ · 2022-06-21
- jas502n/CVE-2020-2625925★ · 2020-12-13
- novysodope/CVE-2020-26217-XStream-RCE-POC4★ · 2020-12-08
- shoucheng3/x-stream__xstream_CVE-2020-26217_1-4-14-java70★ · 2025-08-23
- Kairo-one/CVE-2020-26217-XStream