CVE-2026-78318

EUVD-2026-77439

14.09.2026, 13:18

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.

Cross-site Scripting

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
apache	CNA	6.1 MEDIUM	NETWORK	LOW	NONE	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Base Score

CVSS 3.x

EPSS Score

Percentile: Unknown

Early Detection

Affected products identified ahead of NVD analysis through intelligence sources.

Vendor	Product	Version	Source
apache	syncope	4.0.4 ≤ 𝑥 ≤ 4.0.7	CNA
apache	syncope	𝑥 ≤ 4.1.2	CNA

Common Weakness Enumeration

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
The software does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

References

https://lists.apache.org/thread/wmo15rczvd0w3ywjgqdrcznkb1v3qy9r

http://www.openwall.com/lists/oss-security/2026/09/14/18