CVE-2026-5266
Wikimedia Foundation Echo Sensitive Information Exposure
Description
Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation Echo. This vulnerability is associated with program files includes/Api/ApiEchoNotifications.Php. This issue affects Echo: from * before 1.43.7, 1.44.4, 1.45.2.
INFO
Published Date :
May 11, 2026, 6:16 p.m.
Last Modified :
May 11, 2026, 6:16 p.m.
Remotely Exploit :
Yes !
Source :
c4f26cc8-17ff-4c99-b5e2-38fc1793eacc
Affected Products
The following products are affected by CVE-2026-5266
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 4.0 | LOW | c4f26cc8-17ff-4c99-b5e2-38fc1793eacc | ||||
| CVSS 4.0 | LOW | c4f26cc8-17ff-4c99-b5e2-38fc1793eacc |
Solution
- Update Echo to version 1.45.2.
- Apply later security patches for Echo.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-5266.
| URL | Resource |
|---|---|
| https://phabricator.wikimedia.org/T420154 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-5266 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-5266
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-5266 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-5266 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by c4f26cc8-17ff-4c99-b5e2-38fc1793eacc
May. 11, 2026
Action Type Old Value New Value Added Description Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation Echo. This vulnerability is associated with program files includes/Api/ApiEchoNotifications.Php. This issue affects Echo: from * before 1.43.7, 1.44.4, 1.45.2. Added CVSS V4.0 AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-200 Added Reference https://phabricator.wikimedia.org/T420154