Authentication Bypass via JWT Algorithm Mismatch in Multiple WSO2 Products Allows Account Takeover (WSO2 WSO2 Universal Gateway)
At a glance
- Source
- NVD
- EPSS
- EPSS 22.39 % · percentile 98 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- WSO2
- NVD status
- Analyzed
Description
The JWT authentication mechanism accepts tokens signed with algorithms other than those explicitly configured or supported. This allows an attacker to craft a JWT with an unsupported algorithm, which is then incorrectly validated, leading to unauthorized access. Successful exploitation of this vulnerability may result in unauthorized access to the system, including the potential compromise of administrative accounts and full account takeover. The CVSS score is adjusted to 9.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H) in single-tenant deployments, reflecting that the impact is contained within a single security authority boundary.
Weaknesses (CWE)
- CWE-347 — Improper Verification of Cryptographic Signature
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | CRITICAL 10.0 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H | WSO2 |
| CVSS 3.1 | CRITICAL 10.0 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H | NVD · ed10eef1-636d-4fbe-9993-6890dfa878f8 (Secondary) |
European references
- ENISA EUVD · EUVD-2026-53822
- GCVE · GCVE-0-2026-5430
Affected configurations (NVD CPE)
cpe:2.3:a:wso2:api_control_plane:*:*:*:*:*:*:*:*≥ 4.5.0 < 4.5.0.58cpe:2.3:a:wso2:api_control_plane:*:*:*:*:*:*:*:*≥ 4.6.0 < 4.6.0.22cpe:2.3:a:wso2:api_manager:*:*:*:*:*:*:*:*≥ 4.1.0 < 4.1.0.257cpe:2.3:a:wso2:api_manager:*:*:*:*:*:*:*:*≥ 4.2.0 < 4.2.0.197cpe:2.3:a:wso2:api_manager:*:*:*:*:*:*:*:*≥ 4.3.0 < 4.3.0.108cpe:2.3:a:wso2:api_manager:*:*:*:*:*:*:*:*≥ 4.4.0 < 4.4.0.72cpe:2.3:a:wso2:api_manager:*:*:*:*:*:*:*:*≥ 4.5.0 < 4.5.0.57cpe:2.3:a:wso2:api_manager:*:*:*:*:*:*:*:*≥ 4.6.0 < 4.6.0.21cpe:2.3:a:wso2:traffic_manager:*:*:*:*:*:*:*:*≥ 4.5.0 < 4.5.0.56cpe:2.3:a:wso2:traffic_manager:*:*:*:*:*:*:*:*≥ 4.6.0 < 4.6.0.21cpe:2.3:a:wso2:universal_gateway:*:*:*:*:*:*:*:*≥ 4.5.0 < 4.5.0.57cpe:2.3:a:wso2:universal_gateway:*:*:*:*:*:*:*:*≥ 4.6.0 < 4.6.0.21
Affected products
| Product | Versions |
|---|---|
| WSO2 · WSO2 Universal Gateway | affected 4.5.0 < 4.5.0.57 ; affected 4.6.0 < 4.6.0.21 |
| WSO2 · WSO2 Traffic Manager | affected 4.5.0 < 4.5.0.56 ; affected 4.6.0 < 4.6.0.21 |
| WSO2 · WSO2 API Control Plane | affected 4.5.0 < 4.5.0.58 ; affected 4.6.0 < 4.6.0.22 |
| WSO2 · WSO2 API Manager | unknown 0 < 4.1.0 ; affected 4.1.0 < 4.1.0.257 ; affected 4.2.0 < 4.2.0.197 ; affected 4.3.0 < 4.3.0.108 ; affected 4.4.0 < 4.4.0.72 ; affected 4.5.0 < 4.5.0.57 |
| WSO2 · WSO2 Carbon API Manager Rest API Utility | affected 9.20.74 < 9.20.74.401 ; affected 9.28.116 < 9.28.116.417 ; affected 9.29.120 < 9.29.120.236 ; affected 9.30.67 < 9.30.67.167 ; affected 9.31.86 < 9.31.86.158 ; affected 9.32.147 < 9.32.147.59 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| CISA Known Exploited Vulnerabilities | CC0 1.0 |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |