CVE-2026-5430 KEV
10.0
CRITICAL · CVSS 3.1 · EPSS 0.6% (pctl 46)
Patch first
On CISA KEV — known exploited in the wild, due 2026-09-27.
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.
Scoring
| CVSS | 10.0 (CRITICAL, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
| EPSS | 0.59% — more likely to be exploited than 46% of all CVEs |
| Weakness | CWE-347 |
| On CISA KEV | yes — remediate by 2026-09-27 |
| Public exploit | none known |
| Published | 2026-08-06 |
| Last modified | 2026-09-25 |
CISA KEV
| Name | WSO2 Multiple Products Path Traversal Vulnerability |
|---|---|
| Added | 2026-09-24 |
| Due | 2026-09-27 |
| Vendor / product | WSO2 / Multiple Products |
| Ransomware use | none reported |
Affected (4)
| Vendor | Product |
|---|---|
| wso2 | api control plane |
| wso2 | api manager |
| wso2 | traffic manager |
| wso2 | universal gateway |
References
→ the Explorer · watch your stack · NVD