CVE-2026-58517
Blocked users can create and edit WikiLambda objects
Description
Improper neutralization of input terminators vulnerability in The Wikimedia Foundation Mediawiki - WikiLambda Extension allows Authentication Bypass. This issue affects Mediawiki - WikiLambda Extension: from * before 1.43.9,1.44.6,1.45.4.
INFO
Published Date :
July 1, 2026, 7:16 p.m.
Last Modified :
July 10, 2026, 1:50 p.m.
Remotely Exploit :
Yes !
Source :
c4f26cc8-17ff-4c99-b5e2-38fc1793eacc
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 4.0 | MEDIUM | c4f26cc8-17ff-4c99-b5e2-38fc1793eacc | ||||
| CVSS 4.0 | MEDIUM | c4f26cc8-17ff-4c99-b5e2-38fc1793eacc |
Solution
- Update WikiLambda Extension to version 1.43.9.
- Update WikiLambda Extension to version 1.44.6.
- Update WikiLambda Extension to version 1.45.4.
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-2026-58517.
| URL | Resource |
|---|---|
| https://gerrit.wikimedia.org/r/c/1305376 | Issue Tracking |
| https://phabricator.wikimedia.org/T428833 | Issue Tracking Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-58517 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-2026-58517
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-2026-58517 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-58517 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.
-
Reanalysis by [email protected]
Jul. 10, 2026
Action Type Old Value New Value Changed Reference Type wikimedia-foundation: https://phabricator.wikimedia.org/T428833 Types: Issue Tracking, Third Party Advisory wikimedia-foundation: https://phabricator.wikimedia.org/T428833 Types: Issue Tracking, Vendor Advisory -
Initial Analysis by [email protected]
Jul. 09, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N Added CPE Configuration OR *cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:* versions from (including) 1.44.0 up to (excluding) 1.44.6 *cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:* versions from (including) 1.45.0 up to (excluding) 1.45.4 *cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:* versions from (including) 1.43.0 up to (excluding) 1.43.9 Added Reference Type wikimedia-foundation: https://gerrit.wikimedia.org/r/c/1305376 Types: Issue Tracking Added Reference Type wikimedia-foundation: https://phabricator.wikimedia.org/T428833 Types: Issue Tracking, Third Party Advisory -
New CVE Received by c4f26cc8-17ff-4c99-b5e2-38fc1793eacc
Jul. 01, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'The Wikimedia Foundation', 'product': 'Mediawiki - WikiLambda Extension', 'versions': [{'status': 'affected', 'version': '*', 'lessThan': '1.43.9,1.44.6,1.45.4', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}] Added Description Improper neutralization of input terminators vulnerability in The Wikimedia Foundation Mediawiki - WikiLambda Extension allows Authentication Bypass. This issue affects Mediawiki - WikiLambda Extension: from * before 1.43.9,1.44.6,1.45.4. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/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-288 Added Reference https://gerrit.wikimedia.org/r/c/1305376 Added Reference https://phabricator.wikimedia.org/T428833 -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 01, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-58517', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-07-01T18:34:52.042792Z'}