{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-58187", "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "state": "PUBLISHED", "assignerShortName": "apache", "dateReserved": "2026-06-29T16:35:39.110Z", "datePublished": "2026-07-29T09:03:22.659Z", "dateUpdated": "2026-07-29T12:11:35.420Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "product": "Apache Traffic Server", "vendor": "Apache Software Foundation", "versions": [{"lessThanOrEqual": "8.1.9", "status": "affected", "version": "8.0.0", "versionType": "semver"}, {"lessThanOrEqual": "9.2.14", "status": "affected", "version": "9.0.0", "versionType": "semver"}, {"lessThanOrEqual": "10.1.3", "status": "affected", "version": "10.0.0", "versionType": "semver"}]}], "credits": [{"lang": "en", "type": "reporter", "value": "Omkhar Arasaratnam"}], "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<p>The Apache Traffic Server multiplexer plugin overruns its chunk-decode buffer on upstream input, enabling denial of service.</p><p>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.</p><p>Users are recommended to upgrade to version 9.2.15 or 10.1.4, which fix the issue.</p>"}], "value": "The Apache Traffic Server multiplexer plugin overruns its chunk-decode buffer on upstream input, enabling denial of service.\n\nThis 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.\n\nUsers are recommended to upgrade to version 9.2.15 or 10.1.4, which fix the issue."}], "metrics": [{"other": {"content": {"text": "moderate"}, "type": "Textual description of severity"}}, {"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 3.7, "baseSeverity": "LOW", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}, {"cvssV4_0": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "baseScore": 6.3, "baseSeverity": "MEDIUM", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N", "version": "4.0", "vulnAvailabilityImpact": "LOW", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-787", "description": "CWE-787 Out-of-bounds Write", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "shortName": "apache", "dateUpdated": "2026-07-29T09:03:22.659Z"}, "references": [{"tags": ["vendor-advisory"], "url": "https://lists.apache.org/thread/5prl9glcm9g2swnq9hqxvnokylm1gr6d"}], "source": {"discovery": "UNKNOWN"}, "title": "Apache Traffic Server: Multiplexer plugin chunk decoder enables a denial of service", "x_generator": {"engine": "scripts/cve_render.py"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-07-29T12:11:28.229252Z", "id": "CVE-2026-58187", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-29T12:11:35.420Z"}}]}}

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{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[8.0.0,8.1.9]"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[9.0.0,9.2.14]"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[10.0.0,10.1.3]"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Apache Traffic Server", "source": "cna", "vendor": "Apache Software Foundation"}, "product": "apache_traffic_server", "vendor": "apache"}], "created": "2026-07-29T11:45:03.853372+00:00", "updated": "2026-07-29T11:45:03.853413+00:00", "vendors": ["apache", "apache$PRODUCT$apache_traffic_server"]}