{"api_version":"1","generated_at":"2026-07-31T20:51:13+00:00","cve":"CVE-2026-15978","urls":{"html":"https://cve.report/CVE-2026-15978","api":"https://cve.report/api/cve/CVE-2026-15978.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-15978","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-15978"},"summary":{"title":"CVE-2026-15978","description":"SGLang contains a model weight exfiltration vulnerability when no API keys are configured, as SGLang will expose two endpoints that allow a remote attacker to trigger distributed weight broadcasting using NCCL and then triggering data transfer, attackers can exfiltrate all model weights.","state":"PUBLISHED","assigner":"certcc","published_at":"2026-07-30 19:17:08","updated_at":"2026-07-31 19:17:03"},"problem_types":["CWE-306","CWE-306: Missing Authentication for Critical Function","CWE-306 CWE-306 Missing Authentication for Critical Function"],"metrics":[{"version":"3.1","source":"ADP","type":"DECLARED","score":"7.5","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","data":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","version":"3.1"}},{"version":"3.1","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","type":"Secondary","score":"7.5","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"NONE"}}],"references":[{"url":"https://thoughts.apoorvdayal.com/posts/sglang-disclosures/","name":"https://thoughts.apoorvdayal.com/posts/sglang-disclosures/","refsource":"134c704f-9b21-4f2e-91b3-4a467353bcc0","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/sgl-project/sglang/security/advisories/GHSA-cpqq-22v3-2wfm","name":"https://github.com/sgl-project/sglang/security/advisories/GHSA-cpqq-22v3-2wfm","refsource":"cret@cert.org","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-15978","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-15978","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"SGLang","product":"SGLang","version":"affected v0.5.15 custom","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","version":"3.1"}},{"other":{"content":{"id":"CVE-2026-15978","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","timestamp":"2026-07-31T18:09:38.245312Z","version":"2.0.3"},"type":"ssvc"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-306","description":"CWE-306 Missing Authentication for Critical Function","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-07-31T18:10:22.232Z","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP"},"references":[{"tags":["exploit"],"url":"https://thoughts.apoorvdayal.com/posts/sglang-disclosures/"}],"title":"CISA ADP Vulnrichment"}],"cna":{"affected":[{"product":"SGLang","vendor":"SGLang","versions":[{"lessThanOrEqual":"v0.5.15","status":"affected","version":"0","versionType":"custom"}]}],"descriptions":[{"lang":"en","value":"SGLang contains a model weight exfiltration vulnerability when no API keys are configured, as SGLang will expose two endpoints that allow a remote attacker to trigger distributed weight broadcasting using NCCL and then triggering data transfer, attackers can exfiltrate all model weights."}],"problemTypes":[{"descriptions":[{"description":"CWE-306: Missing Authentication for Critical Function","lang":"en"}]}],"providerMetadata":{"dateUpdated":"2026-07-30T18:08:29.228Z","orgId":"37e5125f-f79b-445b-8fad-9564f167944b","shortName":"certcc"},"references":[{"url":"https://github.com/sgl-project/sglang/security/advisories/GHSA-cpqq-22v3-2wfm"},{"url":"https://thoughts.apoorvdayal.com/posts/sglang-disclosures/"}],"source":{"discovery":"UNKNOWN"},"title":"CVE-2026-15978","x_generator":{"engine":"VINCE 3.0.43","env":"prod","origin":"https://cveawg.mitre.org/api/cve/CVE-2026-15978"}}},"cveMetadata":{"assignerOrgId":"37e5125f-f79b-445b-8fad-9564f167944b","assignerShortName":"certcc","cveId":"CVE-2026-15978","datePublished":"2026-07-30T18:08:29.228Z","dateReserved":"2026-07-16T15:41:50.504Z","dateUpdated":"2026-07-31T18:10:22.232Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-07-30 19:17:08","lastModifiedDate":"2026-07-31 19:17:03","problem_types":["CWE-306","CWE-306: Missing Authentication for Critical Function","CWE-306 CWE-306 Missing Authentication for Critical Function"],"metrics":{"cvssMetricV31":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"NONE"},"exploitabilityScore":3.9,"impactScore":3.6}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-07-31T18:09:38.245312Z","id":"CVE-2026-15978","options":[{"exploitation":"poc"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"15978","Ordinal":"1","Title":"CVE-2026-15978","CVE":"CVE-2026-15978","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"15978","Ordinal":"1","NoteData":"SGLang contains a model weight exfiltration vulnerability when no API keys are configured, as SGLang will expose two endpoints that allow a remote attacker to trigger distributed weight broadcasting using NCCL and then triggering data transfer, attackers can exfiltrate all model weights.","Type":"Description","Title":"CVE-2026-15978"}]}}}