Vulnerability Details CVE-2026-58187
The Apache Traffic Server multiplexer plugin overruns its chunk-decode buffer on upstream input, enabling denial of service.
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 0.005
EPSS Ranking 37.1%
CVSS Severity
CVSS v3 Score 3.7
Products affected by CVE-2026-58187
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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
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cpe:2.3:a:apache:traffic_server:9.0.0
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cpe:2.3:a:apache:traffic_server:9.0.1
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cpe:2.3:a:apache:traffic_server:9.0.2
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cpe:2.3:a:apache:traffic_server:9.1.0
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cpe:2.3:a:apache:traffic_server:9.1.1
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cpe:2.3:a:apache:traffic_server:9.1.2
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cpe:2.3:a:apache:traffic_server:9.1.3
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cpe:2.3:a:apache:traffic_server:9.1.4
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cpe:2.3:a:apache:traffic_server:9.2.0
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cpe:2.3:a:apache:traffic_server:9.2.1
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cpe:2.3:a:apache:traffic_server:9.2.10
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cpe:2.3:a:apache:traffic_server:9.2.11
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cpe:2.3:a:apache:traffic_server:9.2.12
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cpe:2.3:a:apache:traffic_server:9.2.13
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cpe:2.3:a:apache:traffic_server:9.2.14
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cpe:2.3:a:apache:traffic_server:9.2.2
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cpe:2.3:a:apache:traffic_server:9.2.3
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cpe:2.3:a:apache:traffic_server:9.2.4
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cpe:2.3:a:apache:traffic_server:9.2.5
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cpe:2.3:a:apache:traffic_server:9.2.6
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cpe:2.3:a:apache:traffic_server:9.2.7
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cpe:2.3:a:apache:traffic_server:9.2.8
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cpe:2.3:a:apache:traffic_server:9.2.9