CVE-2026-0637 json
Header Injection via Custom URL Configuration in Multiple WSO2 Products Allows Open Redirect and Log Forgery
published 2026-08-06 3 mo ago modified 2026-11-04 4 d ago also EUVD-2026-53820
- cvss
- 5.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 9%
- public exploits
- 0
- none known
Summary
When a proxy server is configured with `customUrl.enabled`, the component accepts user-supplied input within forwarded HTTP headers without enforcing expected validation constraints. A malicious actor can manipulate these headers to influence the URL construction process, leading to an open redirect vulnerability. Additionally, unsanitized header values are written to application logs.
An attacker can exploit this to force redirection to arbitrary malicious domains, potentially enabling phishing attacks. Furthermore, they can inject forged entries into application logs, impacting the reliability of security logs and potentially hindering incident investigation.
Patch / fix
- WSO2 WSO2 API Manager 3.2.0.464, 3.2.1.83, 4.1.0.249, 4.2.0.189, 4.3.0.99, 4.4.0.63, 4.5.0.44, 4.6.0.12
- WSO2 WSO2 API Control Plane 4.5.0.45, 4.6.0.13
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 3 mo ago
Exploit prediction
0.19% chance of exploitation in the next 30 days, higher than 9% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N |
Affected products
- WSO2 WSO2 API Manager
- WSO2 WSO2 API Control Plane
Classification
References
Sources
- CVE List CVE-2026-0637
- NVD CVE-2026-0637
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