CVE-2026-78336CWE-201

CVE-2026-78336

High · published September 14, 2026

CVSS v3.1
7.5
EPSS
0%
Percentile
36.5
In the wild
Unconfirmed
What it is

Insertion of sensitive information into sent data vulnerability in Apache Syncope.

Any authenticated user can query for the list of available OIDC providers configured for SSO with Console and Enduser. The returned payload contains all configuration settings, including client secrets, regardless of the entitlements owned by the caller.

This issue affects Apache Syncope: from 3.0.0-M0 through 3.0.16, from 4.0.0-M0 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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00432 · 36.5th percentile
Weakness
CWE-201 · Insertion of Sensitive Information Into Sent Data
Published
2026-09-14T17:18Z
References (2)
https://lists.apache.org/thread/h399sqmf4wgnfxxpd6x9lm3m672rrsjt · [email protected]http://www.openwall.com/lists/oss-security/2026/09/14/20 · af854a3a-2127-422b-91ae-364da2661108
EPSS history
Timeline
  • 17 SEP 03:32Z
    EPSS moved — → 0%
    epss
  • 14 SEP 12:23Z
    Apache Syncope: OIDCC4UI provider list discloses client secrets to any authenticated user
    cvelistv5