{"dataType": "CVE_RECORD", "cveMetadata": {"state": "PUBLISHED", "cveId": "CVE-2026-88753", "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "dateUpdated": "2026-10-15T15:19:21.380Z", "dateReserved": "2026-09-10T00:00:00.000Z", "datePublished": "2026-10-15T00:00:00.000Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre", "dateUpdated": "2026-10-15T15:19:21.380Z"}, "descriptions": [{"lang": "en", "value": "A Regular-Expression Denial of Service (ReDoS) in the Markdown2. extract_metadata() function (lib/markdown2.py) of trentm markdown2 through v2.5.5 allows attackers to cause a Denial of Service (DoS) via a crafted Markdown document."}], "affected": [{"vendor": "n/a", "product": "n/a", "versions": [{"version": "n/a", "status": "affected"}]}], "references": [{"url": "https://gist.github.com/NanaSec/354b4188bbd7f4105008c7b8be49b0ba"}], "problemTypes": [{"descriptions": [{"type": "text", "lang": "en", "description": "n/a"}]}]}}, "dataVersion": "5.2"}

{}

{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "[email protected]"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A Regular-Expression Denial of Service (ReDoS) in the Markdown2. extract_metadata() function (lib/markdown2.py) of trentm markdown2 through v2.5.5 allows attackers to cause a Denial of Service (DoS) via a crafted Markdown document."}], "id": "CVE-2026-88753", "lastModified": "2026-10-16T19:56:15.773", "metrics": {}, "published": "2026-10-15T16:18:22.887", "references": [{"source": "[email protected]", "url": "https://gist.github.com/NanaSec/354b4188bbd7f4105008c7b8be49b0ba"}], "sourceIdentifier": "[email protected]", "vulnStatus": "Deferred"}

{"bugzilla": {"description": "markdown2: markdown2: Denial of Service via crafted Markdown document", "id": "2553572", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2553572"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.3", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "status": "draft"}, "cwe": "CWE-1333", "details": ["A flaw was found in markdown2. In the extract_metadata function, an inefficient regular expression used to parse document metadata can take an exponential amount of time to process. An attacker can exploit this vulnerability by providing a crafted Markdown document, causing excessive resource consumption and leading to a Denial of Service (DoS)."], "name": "CVE-2026-88753", "package_state": [{"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift4/ose-olm-catalogd-rhel9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-10-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-88753\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-88753\nhttps://gist.github.com/NanaSec/354b4188bbd7f4105008c7b8be49b0ba"], "threat_severity": "Moderate"}

{"created": "2026-10-16T07:30:14.968437+00:00", "updated": "2026-10-16T23:00:07.224160+00:00", "vendors": [], "weaknesses": ["CWE-1333"]}