Vulnerability Details 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, 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 3.1%
CVSS Severity
CVSS v3 Score 4.9
Products affected by CVE-2026-58156
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cpe:2.3:a:apache:traffic_server:10.0.0
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cpe:2.3:a:apache:traffic_server:10.0.1
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cpe:2.3:a:apache:traffic_server:10.0.2
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cpe:2.3:a:apache:traffic_server:10.0.3
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cpe:2.3:a:apache:traffic_server:10.0.4
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cpe:2.3:a:apache:traffic_server:10.0.5
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cpe:2.3:a:apache:traffic_server:10.0.6
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cpe:2.3:a:apache:traffic_server:10.1.0
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cpe:2.3:a:apache:traffic_server:10.1.1
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cpe:2.3:a:apache:traffic_server:10.1.2
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cpe:2.3:a:apache:traffic_server:10.1.3
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cpe:2.3:a:apache:traffic_server:8.0.0
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cpe:2.3:a:apache:traffic_server:8.0.1
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cpe:2.3:a:apache:traffic_server:8.0.2
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cpe:2.3:a:apache:traffic_server:8.0.3
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cpe:2.3:a:apache:traffic_server:8.0.4
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cpe:2.3:a:apache:traffic_server:8.0.5
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cpe:2.3:a:apache:traffic_server:8.0.6
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cpe:2.3:a:apache:traffic_server:8.0.7
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cpe:2.3:a:apache:traffic_server:8.0.8
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cpe:2.3:a:apache:traffic_server:8.1.0
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cpe:2.3:a:apache:traffic_server:8.1.1
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cpe:2.3:a:apache:traffic_server:8.1.2
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cpe:2.3:a:apache:traffic_server:8.1.3
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cpe:2.3:a:apache:traffic_server:8.1.4
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cpe:2.3:a:apache:traffic_server:8.1.5
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cpe:2.3:a:apache:traffic_server:8.1.6
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cpe:2.3:a:apache:traffic_server:8.1.7
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cpe:2.3:a:apache:traffic_server:8.1.8
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cpe:2.3:a:apache:traffic_server:8.1.9