{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-28356", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-02-26T18:38:13.890Z", "datePublished": "2026-03-12T16:45:01.070Z", "dateUpdated": "2026-08-24T12:07:08.274Z" }, "containers": { "cna": { "title": "ReDoS in multipart 1.3.0 - `parse_options_header()`", "problemTypes": [ { "descriptions": [ { "cweId": "CWE-1333", "lang": "en", "description": "CWE-1333: Inefficient Regular Expression Complexity", "type": "CWE" } ] } ], "metrics": [ { "cvssV3_1": { "attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1" } } ], "references": [ { "name": "https://github.com/defnull/multipart/security/advisories/GHSA-p2m9-wcp5-6qw3", "tags": [ "x_refsource_CONFIRM" ], "url": "https://github.com/defnull/multipart/security/advisories/GHSA-p2m9-wcp5-6qw3" } ], "affected": [ { "vendor": "defnull", "product": "multipart", "versions": [ { "version": ">= 1.3.0, < 1.3.1", "status": "affected" }, { "version": "< 1.2.2", "status": "affected" } ] } ], "providerMetadata": { "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-03-12T16:45:01.070Z" }, "descriptions": [ { "lang": "en", "value": "multipart is a fast multipart/form-data parser for python. Prior to 1.2.2, 1.3.1 and 1.4.0-dev, the parse_options_header() function in multipart.py uses a regular expression with an ambiguous alternation, which can cause exponential backtracking (ReDoS) when parsing maliciously crafted HTTP or multipart segment headers. This can be abused for denial of service (DoS) attacks against web applications using this library to parse request headers or multipart/form-data streams. The issue is fixed in 1.2.2, 1.3.1 and 1.4.0-dev." } ], "source": { "advisory": "GHSA-p2m9-wcp5-6qw3", "discovery": "UNKNOWN" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2026-03-13T16:29:21.955869Z", "id": "CVE-2026-28356", "options": [ { "Exploitation": "none" }, { "Automatable": "yes" }, { "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": "2026-03-13T16:29:28.768Z" } }, { "affected": [ { "collectionURL": "https://catalog.redhat.com/software/containers/", "cpes": [ "cpe:/a:redhat:ai_inference_server:3.2::el9" ], "defaultStatus": "affected", "packageName": "rhaiis/vllm-cuda-rhel9", "product": "Red Hat AI Inference Server 3.2", "vendor": "Red Hat", "versions": [ { "lessThan": "*", "status": "unaffected", "version": "1774351144", "versionType": "rpm" } ] }, { 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"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": [ "cpe:/a:redhat:satellite:6" ], "defaultStatus": "affected", "packageName": "satellite/iop-host-inventory-rhel9", "product": "Red Hat Satellite 6", "vendor": "Red Hat" }, { "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": [ "cpe:/a:redhat:satellite:6" ], "defaultStatus": "affected", "packageName": "satellite/iop-vmaas-rhel9", "product": "Red Hat Satellite 6", "vendor": "Red Hat" }, { "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": [ "cpe:/a:redhat:satellite:6" ], "defaultStatus": "affected", "packageName": "satellite/iop-vulnerability-engine-rhel9", "product": "Red Hat Satellite 6", "vendor": "Red Hat" } ], "datePublic": "2026-03-12T16:45:01.070Z", "descriptions": [ { "lang": "en", "value": "A flaw was found in multipart. The parse_options_header function in multipart.py uses a regular expression with an ambiguous alternation, causing an exponential backtracking (ReDoS) when parsing a specially crafted HTTP or multipart segment headers. A web application parsing request headers or multipart/form-data streams can block request handling threads for multiple seconds per request, eventually resulting in a denial of service." } ], "metrics": [ { "other": { "content": { "namespace": "https://access.redhat.com/security/updates/classification/", "value": "Important" }, "type": "Red Hat severity rating" } }, { "cvssV3_1": { "attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1" }, "format": "CVSS" } ], "problemTypes": [ { "descriptions": [ { "cweId": "CWE-1333", "description": "Inefficient Regular Expression Complexity", "lang": "en", "type": "CWE" } ] } ], "references": [ { "tags": [ "vdb-entry", "x_refsource_REDHAT" ], "url": "https://access.redhat.com/security/cve/CVE-2026-28356" }, { "name": "RHBZ#2447059", "tags": [ "issue-tracking", "x_refsource_REDHAT" ], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2447059" }, { "tags": [ "x_sadp-csaf-vex" ], "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-28356.json" }, { "tags": [ "vendor-advisory", "x_refsource_REDHAT" ], "url": "https://access.redhat.com/errata/RHSA-2026:6761" }, { "tags": [ "vendor-advisory", "x_refsource_REDHAT" ], "url": "https://access.redhat.com/errata/RHSA-2026:5809" }, { "tags": [ "vendor-advisory", "x_refsource_REDHAT" ], "url": "https://access.redhat.com/errata/RHSA-2026:6762" }, { "tags": [ "vendor-advisory", "x_refsource_REDHAT" ], "url": "https://access.redhat.com/errata/RHSA-2026:10184" }, { "tags": [ "vendor-advisory", "x_refsource_REDHAT" ], "url": "https://access.redhat.com/errata/RHSA-2026:42644" }, { "tags": [ "vendor-advisory", "x_refsource_REDHAT" ], "url": "https://access.redhat.com/errata/RHSA-2026:37275" } ], "solutions": [ { "lang": "en", "value": "RHSA-2026:6761: Red Hat AI Inference Server 3.2" }, { "lang": "en", "value": "RHSA-2026:5809: Red Hat AI Inference Server 3.2" }, { "lang": "en", "value": "RHSA-2026:6762: Red Hat AI Inference Server 3.2" }, { "lang": "en", "value": "RHSA-2026:10184: Red Hat OpenShift AI 2.25" }, { "lang": "en", "value": "RHSA-2026:42644: Red Hat OpenShift AI 2.25" }, { "lang": "en", "value": "RHSA-2026:37275: Red Hat OpenShift AI 3.3" } ], "timeline": [ { "lang": "en", "time": "2026-03-12T18:01:57.290Z", "value": "Reported to Red Hat." }, { "lang": "en", "time": "2026-03-12T16:45:01.070Z", "value": "Made public." } ], "title": "multipart: denial of service via maliciously crafted HTTP or multipart segment headers", "workarounds": [ { "lang": "en", "value": "Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible." } ], "x_adpType": "supplier", "x_generator": { "engine": "sadp-cli 1.0.0" }, "providerMetadata": { "orgId": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "shortName": "redhat-SADP", "dateUpdated": "2026-08-24T12:07:08.274Z" } } ] } }