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MEDIUM · 4.9

CVE-2026-58156

Apache Traffic Server mis-parses ports in URLs and userinfo, allowing port-based access-control bypass. This issue affects Apache Traffic Server: from 8.0.0 through 8.1.9, from 9.0.0 through 9.2.14, ...

Vulnerability Description

Apache Traffic Server mis-parses ports in URLs and userinfo, allowing port-based access-control bypass. This issue affects Apache Traffic Server: from 8.0.0 through 8.1.9, from 9.0.0 through 9.2.14, from 10.0.0 through 10.1.3. Users are recommended to upgrade to version 9.2.15 or 10.1.4, which fix the issue.

CVSS Score

4.9

MEDIUM

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE

Affected Products

VendorProductVersions
ApacheTraffic Server>= 8.0.0, <= 8.1.9

Related Weaknesses (CWE)

CWE-863

References

FAQ

What is CVE-2026-58156?

CVE-2026-58156 is a vulnerability with a CVSS score of 4.9 (MEDIUM). Apache Traffic Server mis-parses ports in URLs and userinfo, allowing port-based access-control bypass. This issue affects Apache Traffic Server: from 8.0.0 through 8.1.9, from 9.0.0 through 9.2.14, ...

How severe is CVE-2026-58156?

CVE-2026-58156 has been rated MEDIUM with a CVSS base score of 4.9/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-58156?

Check the references section above for vendor advisories and patch information. Affected products include: Apache Traffic Server.