{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-6533", "assignerOrgId": "ceab7361-8a18-47b1-92ba-4d7d25f6715a", "state": "PUBLISHED", "assignerShortName": "GitLab", "dateReserved": "2026-04-17T15:06:17.671Z", "datePublished": "2026-04-30T05:36:39.300Z", "dateUpdated": "2026-04-30T05:36:39.300Z"}, "containers": {"cna": {"title": "Improperly Controlled Sequential Memory Allocation in Wireshark", "descriptions": [{"lang": "en", "value": "Dissection engine LZ77 decompression crash in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service"}], "affected": [{"vendor": "Wireshark Foundation", "product": "Wireshark", "versions": [{"version": "4.6.0", "status": "affected", "lessThan": "4.6.5", "versionType": "semver"}, {"version": "4.4.9", "status": "affected", "lessThan": "4.4.15", "versionType": "semver"}], "defaultStatus": "unaffected"}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "CWE-1325: Improperly Controlled Sequential Memory Allocation", "cweId": "CWE-1325", "type": "CWE"}]}], "references": [{"url": "https://www.wireshark.org/security/wnpa-sec-2026-28.html"}, {"url": "https://gitlab.com/wireshark/wireshark/-/issues/21127", "name": "GitLab Issue #21127", "tags": ["issue-tracking", "permissions-required"]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM"}}], "solutions": [{"lang": "en", "value": "Upgrade to version 4.6.5 or above"}], "credits": [{"lang": "en", "value": "Sharon Brizinov", "type": "finder"}], "providerMetadata": {"orgId": "ceab7361-8a18-47b1-92ba-4d7d25f6715a", "shortName": "GitLab", "dateUpdated": "2026-04-30T05:36:39.300Z"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "Dissection engine LZ77 decompression crash in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service"}], "id": "CVE-2026-6533", "lastModified": "2026-04-30T07:16:40.627", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "cve@gitlab.com", "type": "Secondary"}]}, "published": "2026-04-30T07:16:40.627", "references": [{"source": "cve@gitlab.com", "url": "https://gitlab.com/wireshark/wireshark/-/issues/21127"}, {"source": "cve@gitlab.com", "url": "https://www.wireshark.org/security/wnpa-sec-2026-28.html"}], "sourceIdentifier": "cve@gitlab.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-1325"}], "source": "cve@gitlab.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[4.6.0,4.6.5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[4.4.9,4.4.15)"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Wireshark", "source": "cna", "vendor": "Wireshark Foundation"}, "product": "wireshark", "vendor": "wireshark"}], "created": "2026-04-30T08:15:31.925009+00:00", "updated": "2026-04-30T08:15:31.925080+00:00", "vendors": ["wireshark", "wireshark$PRODUCT$wireshark"]}