CVE-2026-5430: WSO2 Multiple Products Path Traversal Vulnerability
- Is it exploited?
Yes. CISA added it to the Known Exploited Vulnerabilities catalog on , 49 days after the CVE record was published.
- How likely is exploitation in the next 30 days?
- 22.4%
EPSS score, percentile 97.7 of all scored records
- How severe?
- 10.0 Critical
CVSS v3.1 base score, given by the CNA
- What should I do?
CISA deadline . Apply mitigations in accordance with vendor instructions … Full text
- Which versions are affected?
Affected
- from 4.5.0 to before 4.5.0.57
- from 4.6.0 to before 4.6.0.21
- from 4.5.0 to before 4.5.0.56
- from 4.6.0 to before 4.6.0.21
- from 4.5.0 to before 4.5.0.58
- from 4.6.0 to before 4.6.0.22
and 12 more in the table below
Unaffected 9.33.106
Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of ; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of ; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of . About the data.
What to do
Required action, set by CISA
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
CISA due date for this action: .
Solution (from the CVE record)
Follow the instructions given on https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2026-5328/#solution https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2026-5328/#solution
Advisories and patches
Linked from CISA's catalog entry
- https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2026-5328/
- https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk
- https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk
- https://nvd.nist.gov/vuln/detail/CVE-2026-5430
Affected products and versions
As listed in the CVE record.
| Status | Versions |
|---|---|
| Affected | from 4.5.0 to before 4.5.0.57 |
| Affected | from 4.6.0 to before 4.6.0.21 |
Versions not listed are: unaffected.
| Status | Versions |
|---|---|
| Affected | from 4.5.0 to before 4.5.0.56 |
| Affected | from 4.6.0 to before 4.6.0.21 |
Versions not listed are: unaffected.
| Status | Versions |
|---|---|
| Affected | from 4.5.0 to before 4.5.0.58 |
| Affected | from 4.6.0 to before 4.6.0.22 |
Versions not listed are: unaffected.
| Status | Versions |
|---|---|
| Unknown | before 4.1.0 |
| Affected | from 4.1.0 to before 4.1.0.257 |
| Affected | from 4.2.0 to before 4.2.0.197 |
| Affected | from 4.3.0 to before 4.3.0.108 |
| Affected | from 4.4.0 to before 4.4.0.72 |
| Affected | from 4.5.0 to before 4.5.0.57 |
| Affected | from 4.6.0 to before 4.6.0.21 |
Versions not listed are: unaffected.
| Status | Versions |
|---|---|
| Affected | from 9.20.74 to before 9.20.74.401 |
| Affected | from 9.28.116 to before 9.28.116.417 |
| Affected | from 9.29.120 to before 9.29.120.236 |
| Affected | from 9.30.67 to before 9.30.67.167 |
| Affected | from 9.31.86 to before 9.31.86.158 |
| Affected | from 9.32.147 to before 9.32.147.59 |
| Unaffected | 9.33.106 |
Versions not listed are: unknown.
Versions the record lists as unaffected: 9.33.106.
Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of . About the data.
About this vulnerability
WSO2 API Control Plane, API Manager, Traffic Manager & Universal Gateway contain a path traversal vulnerability that could allow for unrestricted file upload and lead to remote code execution.
Summary: CISA's KEV catalog, as of .
- CISA added CVE-2026-5430 to its Known Exploited Vulnerabilities (KEV) catalog on 24 Sep 2026.
- CISA's ransomware flag for this entry is "Unknown": no evidence of ransomware use in the catalog, which is not proof of none.
- The due date CISA sets for the required action is 27 Sep 2026.
- The CVE record was published on 6 Aug 2026, 49 days before it was added to KEV.
- The CVE record carries a CVSS v3.1 base score of 10.0 (Critical), given by its CNA.
- FIRST's EPSS model puts the probability of exploitation in the next 30 days at 22.4% (percentile 97.7), as of 28 Oct 2026.
- CISA's SSVC assessment in the CVE record: exploitation active, automatable yes, technical impact total.
Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of ; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of ; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of . About the data.
Description
Authentication Bypass via JWT Algorithm Mismatch in Multiple WSO2 Products Allows Account Takeover
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.
Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of . About the data.
Weakness
- CWE-347: Improper Validation of Certificate With Host Mismatch
Attack patterns (CAPEC)
- CAPEC-239: CAPEC-239: Token Verification Bypass
CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record and the KEV entry.
Timeline
| Date | Event |
|---|---|
| CVE record published | |
| Added to CISA KEV | |
| CVE record last updated | |
| CISA due date for the required action |
More exploited WSO2 vulnerabilities
- CVE-2022-29464: WSO2 Multiple Products Unrestrictive Upload of File Vulnerability