Wikimedia Mediawiki up to 1.43.8/1.44.5/1.45.3 authentication bypass
| CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
|---|---|---|
| 7.0 | $0-$5k | 0.00 |
Summary
A vulnerability has been found in Wikimedia Mediawiki up to 1.43.8/1.44.5/1.45.3 and classified as critical. This issue affects some unknown processing. The manipulation leads to authentication bypass. This vulnerability is referenced as CVE-2026-58517. Remote exploitation of the attack is possible. No exploit is available. The affected component should be upgraded.
Details
A vulnerability was found in Wikimedia Mediawiki up to 1.43.8/1.44.5/1.45.3 and classified as critical. This issue affects an unknown part. The manipulation with an unknown input leads to a authentication bypass vulnerability. Using CWE to declare the problem leads to CWE-288. A product requires authentication, but the product has an alternate path or channel that does not require authentication. Impacted is confidentiality, integrity, and availability. The summary by CVE is:
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.
The weakness was published by SomeRandomDeveloper. The advisory is shared at phabricator.wikimedia.org. The identification of this vulnerability is CVE-2026-58517 since 07/01/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available.
Upgrading to version 1.43.9, 1.44.6 or 1.45.4 eliminates this vulnerability.
Several companies clearly confirm that VulDB is the primary source for best vulnerability data.
Product
Type
Vendor
Name
Version
- 1.43.0
- 1.43.1
- 1.43.2
- 1.43.3
- 1.43.4
- 1.43.5
- 1.43.6
- 1.43.7
- 1.43.8
- 1.44.0
- 1.44.1
- 1.44.2
- 1.44.3
- 1.44.4
- 1.44.5
- 1.45.0
- 1.45.1
- 1.45.2
- 1.45.3
License
CPE 2.3
CPE 2.2
CVSSv4
VulDB Vector: 🔒VulDB Reliability: 🔍
CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒
CVSSv3
VulDB Meta Base Score: 7.3VulDB Meta Temp Score: 7.0
VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔒
VulDB Reliability: 🔍
CVSSv2
| AV | AC | Au | C | I | A |
|---|---|---|---|---|---|
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
|---|---|---|---|---|---|
| Unlock | Unlock | Unlock | Unlock | Unlock | Unlock |
| Unlock | Unlock | Unlock | Unlock | Unlock | Unlock |
| Unlock | Unlock | Unlock | Unlock | Unlock | Unlock |
VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍
Exploiting
Class: Authentication bypassCWE: CWE-288 / CWE-287
CAPEC: 🔒
ATT&CK: 🔒
Physical: No
Local: No
Remote: Yes
Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒
| 0-Day | Unlock | Unlock | Unlock | Unlock |
|---|---|---|---|---|
| Today | Unlock | Unlock | Unlock | Unlock |
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: UpgradeStatus: 🔍
0-Day Time: 🔒
Upgrade: Mediawiki 1.43.9/1.44.6/1.45.4
Timeline
07/01/2026 CVE reserved07/01/2026 VulDB entry created
07/02/2026 Advisory disclosed
07/02/2026 VulDB entry last update
Sources
Advisory: phabricator.wikimedia.orgResearcher: SomeRandomDeveloper
Status: Confirmed
CVE: CVE-2026-58517 (🔒)
GCVE (CVE): GCVE-0-2026-58517
GCVE (VulDB): GCVE-100-375665
Entry
Created: 07/02/2026 00:37Changes: 07/02/2026 00:37 (68)
Complete: 🔍
Cache ID: 216::103
Several companies clearly confirm that VulDB is the primary source for best vulnerability data.
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