Medium severity · published Sep 14, 2026
CVE-2026-78318
Apache Syncope: Unauthenticated reflected XSS in Console and Enduser
6.1
CVSS
0.3%
EPSS
No
On KEV
Description
Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in Apache Syncope.
The notification message, as optionally shown by Console's and Enduser's login pages can be instructed to display HTML tags with unsafe JS inline, via malicious HTTP link generation.
This issue affects Apache Syncope: from 4.0.4 through 4.0.7, from 4.1.0-M0 through 4.1.2.
Users are recommended to upgrade to version 4.0.8 / 4.1.3, which fix this issue.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 18% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AS
Apache Syncope · Apache Software Foundation
4.0.4 through 4.0.7; 4.1.0-M0 through 4.1.2 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-78318
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-78318
lists.apache.org
https://lists.apache.org/thread/wmo15rczvd0w3ywjgqdrcznkb1v3qy9r
www.openwall.com
http://www.openwall.com/lists/oss-security/2026/09/14/18
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