Type Vulnerability
CVE-2026-5430 has an estimated attack likelihood score of 0.224 (~22.4% estimated chance of exploitation in the next 30 days; 97.7th percentile) as of 2026-11-14.
Path traversal
WSO2 Multiple Products Path Traversal Vulnerability
CVE-2026-5430
What this means
This is rated critical severity (10 out of 10). It is on the known-exploited catalogue, which means attacks using it have already been seen. Ask IT whether WSO2 Multiple Products is in your estate, and treat that as the priority.
Full vendor 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 and exploitation
10.0/ 10
CVSS 3.1 base scoreCritical
Exploitable over the network without any account, and no one has to click or open anything. High impact on confidentiality, integrity and availability, and it can reach beyond the vulnerable system.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Exploitability
Longer bar: easier to attack
Attack vectorNetworkAV:N
Attack complexityLowAC:L
Privileges requiredNonePR:N
User interactionNoneUI:N
ScopeChangedS:C
Impact
Longer bar: more harm
ConfidentialityHighC:H
IntegrityHighI:H
AvailabilityHighA:H
- Elevated attack likelihood (~22.4% in 30 days)Model estimate (): a probability signal, not confirmed exploitation
- Exploited in the wild
- Yes — confirmed exploitation (US CISA )
- Not reported
- Listed product
- WSO2 Multiple Products