{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-49838", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-06-01T18:50:36.056Z", "datePublished": "2026-09-10T21:57:15.723Z", "dateUpdated": "2026-09-11T20:31:16.420Z"}, "containers": {"cna": {"title": "GoBGP confederation validation panics on empty AS_PATH attribute", "problemTypes": [{"descriptions": [{"cweId": "CWE-129", "lang": "en", "description": "CWE-129: Improper Validation of Array Index", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 5.9, "baseSeverity": "MEDIUM", "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:H", "version": "3.1"}}], "references": [{"name": "https://github.com/osrg/gobgp/security/advisories/GHSA-frrj-87jh-2772", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/osrg/gobgp/security/advisories/GHSA-frrj-87jh-2772"}, {"name": "https://github.com/osrg/gobgp/commit/4a319a6c25630fb3cdbda3e9ccfe56e702bdaaa0", "tags": ["x_refsource_MISC"], "url": "https://github.com/osrg/gobgp/commit/4a319a6c25630fb3cdbda3e9ccfe56e702bdaaa0"}], "affected": [{"vendor": "osrg", "product": "gobgp", "versions": [{"version": "< 4.7.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-09-10T21:57:15.723Z"}, "descriptions": [{"lang": "en", "value": "GoBGP is an open source Border Gateway Protocol (BGP) implementation in the Go Programming Language. Prior to version 4.7.0, GoBGP accepts a zero-length AS_PATH during UPDATE decoding and later panics while validating that attribute for a confederation eBGP peer. The vulnerable path is in the BGP UPDATE validator: a malformed UPDATE that should be rejected as a malformed AS_PATH instead reaches an unchecked `p.Value[0]` access, allowing a configured confederation eBGP peer to trigger a denial of service. Version 4.7.0 patches the issue."}], "source": {"advisory": "GHSA-frrj-87jh-2772", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-09-11T16:31:55.831766Z", "id": "CVE-2026-49838", "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": "2026-09-11T20:31:16.420Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-49838", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-09-11T16:31:55.831766Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-11T16:31:57.039Z"}}], "cna": {"title": "GoBGP confederation validation panics on empty AS_PATH attribute", "source": {"advisory": "GHSA-frrj-87jh-2772", "discovery": "UNKNOWN"}, "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.9, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}}], "affected": [{"vendor": "osrg", "product": "gobgp", "versions": [{"status": "affected", "version": "< 4.7.0"}]}], "references": [{"url": "https://github.com/osrg/gobgp/security/advisories/GHSA-frrj-87jh-2772", "name": "https://github.com/osrg/gobgp/security/advisories/GHSA-frrj-87jh-2772", "tags": ["x_refsource_CONFIRM"]}, {"url": "https://github.com/osrg/gobgp/commit/4a319a6c25630fb3cdbda3e9ccfe56e702bdaaa0", "name": "https://github.com/osrg/gobgp/commit/4a319a6c25630fb3cdbda3e9ccfe56e702bdaaa0", "tags": ["x_refsource_MISC"]}], "descriptions": [{"lang": "en", "value": "GoBGP is an open source Border Gateway Protocol (BGP) implementation in the Go Programming Language. Prior to version 4.7.0, GoBGP accepts a zero-length AS_PATH during UPDATE decoding and later panics while validating that attribute for a confederation eBGP peer. The vulnerable path is in the BGP UPDATE validator: a malformed UPDATE that should be rejected as a malformed AS_PATH instead reaches an unchecked `p.Value[0]` access, allowing a configured confederation eBGP peer to trigger a denial of service. Version 4.7.0 patches the issue."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-129", "description": "CWE-129: Improper Validation of Array Index"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-09-10T21:57:15.723Z"}}}, "cveMetadata": {"cveId": "CVE-2026-49838", "state": "PUBLISHED", "dateUpdated": "2026-09-11T20:31:16.420Z", "dateReserved": "2026-06-01T18:50:36.056Z", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "datePublished": "2026-09-10T21:57:15.723Z", "assignerShortName": "GitHub_M"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"product": "gobgp", "vendor": "osrg", "versions": [{"status": "affected", "version": "< 4.7.0"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "GoBGP is an open source Border Gateway Protocol (BGP) implementation in the Go Programming Language. Prior to version 4.7.0, GoBGP accepts a zero-length AS_PATH during UPDATE decoding and later panics while validating that attribute for a confederation eBGP peer. The vulnerable path is in the BGP UPDATE validator: a malformed UPDATE that should be rejected as a malformed AS_PATH instead reaches an unchecked `p.Value[0]` access, allowing a configured confederation eBGP peer to trigger a denial of service. Version 4.7.0 patches the issue."}], "id": "CVE-2026-49838", "lastModified": "2026-09-11T21:17:10.667", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 5.9, "baseSeverity": "MEDIUM", "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:H", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-49838", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-09-11T16:31:55.831766Z", "version": "2.0.3"}}]}, "published": "2026-09-10T22:16:57.660", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/osrg/gobgp/commit/4a319a6c25630fb3cdbda3e9ccfe56e702bdaaa0"}, {"source": "security-advisories@github.com", "url": "https://github.com/osrg/gobgp/security/advisories/GHSA-frrj-87jh-2772"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-129"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{"bugzilla": {"description": "github.com/osrg/gobgp: GoBGP: Denial of Service via malformed BGP UPDATE message", "id": "2531686", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2531686"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.9", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-125", "details": ["A flaw was found in GoBGP, an open-source Border Gateway Protocol (BGP) implementation. A configured confederation eBGP peer can send a specially crafted BGP UPDATE message with a zero-length AS_PATH attribute. This malformed message is improperly handled during validation, leading to an unchecked memory access that causes the GoBGP process to crash. This vulnerability results in a denial of service for the affected system."], "name": "CVE-2026-49838", "package_state": [{"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift4/metallb-rhel8", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-09-10T21:57:15Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-49838\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-49838\nhttps://github.com/osrg/gobgp/commit/4a319a6c25630fb3cdbda3e9ccfe56e702bdaaa0\nhttps://github.com/osrg/gobgp/security/advisories/GHSA-frrj-87jh-2772"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,4.7.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "gobgp", "source": "cna", "vendor": "osrg"}, "product": "gobgp", "vendor": "osrg"}], "created": "2026-09-11T01:00:09.673008+00:00", "updated": "2026-09-12T02:45:06.766965+00:00", "vendors": ["osrg", "osrg$PRODUCT$gobgp"]}