CVE-2026-5430
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.
- CVSS
- 10.0
- EPSS
- 0.004 (28.6th percentile)
- CISA KEV
- Added 2026-09-24, due 2026-09-27
- Exploitation
- active
- Public exploits
- 1 repositories
- State
- PUBLISHED
Coverage
Actively exploitedCritical 100BleepingComputer
CISA warns of Sharepoint, WSO2, Adobe Commerce flaws exploited in attacks
The Cybersecurity and Infrastructure Security Agency (CISA) warns that hackers are exploiting a critical authentication bypass vulnerability (CVE-2026-5430) affecting multiple products from enterprise software provider WSO2. [...]
Actively exploitedCritical 100CISA advisories & alerts
CISA Adds Two Known Exploited Vulnerabilities to Catalog
CISA has added two new vulnerabilities to its Known Exploited Vulnerabilities (KEV) Catalog, based on evidence of active exploitation. CVE-2026-5430 WSO2 Multiple Products Path Traversal Vulnerability CVE-2026-71362 Adobe Commerce and Magento Incorrect Authorization Vulnerability These types of…
What we observed
- poc publishedpoc-in-github
- kev addedcisa-kev