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CVE-2026-0637

MEDIUMCVSS 5.4/10EPSS 0.16%

Last modified

CVE-2026-0637 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. 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. EPSS estimates a 0.16% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1
5.4/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

EPSS Probability
0.16%

5.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
Wso2Api Control Plane>= 4.5.0, < 4.5.0.50
Wso2Api Control Plane>= 4.6.0, < 4.6.0.14
Wso2Api Manager>= 3.1.0, < 3.1.0.357
Wso2Api Manager>= 3.2.0, < 3.2.0.465
Wso2Api Manager>= 3.2.1, < 3.2.1.84
Wso2Api Manager>= 4.1.0, < 4.1.0.249
Wso2Api Manager>= 4.2.0, < 4.2.0.189
Wso2Api Manager>= 4.3.0, < 4.3.0.100
Wso2Api Manager>= 4.4.0, < 4.4.0.64
Wso2Api Manager>= 4.5.0, < 4.5.0.49
Wso2Api Manager>= 4.6.0, < 4.6.0.13
Wso2Identity Server>= 5.10.0, < 5.10.0.386
Wso2Identity Server>= 5.11.0, < 5.11.0.433
Wso2Identity Server>= 6.0.0, < 6.0.0.260
Wso2Identity Server>= 6.1.0, < 6.1.0.261
Wso2Identity Server As Key Manager>= 5.10.0, < 5.10.0.377
Wso2Open Banking Am>= 2.0.0, < 2.0.0.406
Wso2Open Banking Iam>= 2.0.0, < 2.0.0.426
Wso2Traffic Manager>= 4.5.0, < 4.5.0.48
Wso2Traffic Manager>= 4.6.0, < 4.6.0.13
Wso2Universal Gateway>= 4.5.0, < 4.5.0.49
Wso2Universal Gateway>= 4.6.0, < 4.6.0.13

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2026-0637?
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.
How severe is CVE-2026-0637?
CVE-2026-0637 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.16% probability of exploitation in the next 30 days.
How do I fix CVE-2026-0637?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST