{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-54735","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-06-15T23:07:33.233Z","datePublished":"2026-07-29T15:59:46.640Z","dateUpdated":"2026-07-29T18:04:18.670Z"},"containers":{"cna":{"title":"prebid-server's request forgery vulnerability allows for possible host environment data extraction","problemTypes":[{"descriptions":[{"cweId":"CWE-918","lang":"en","description":"CWE-918: Server-Side Request Forgery (SSRF)","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":10,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","version":"3.1"}}],"references":[{"name":"https://github.com/prebid/prebid-server/security/advisories/GHSA-4p3g-4hcj-wpvx","tags":["x_refsource_CONFIRM"],"url":"https://github.com/prebid/prebid-server/security/advisories/GHSA-4p3g-4hcj-wpvx"},{"name":"https://github.com/prebid/prebid-server/pull/4802","tags":["x_refsource_MISC"],"url":"https://github.com/prebid/prebid-server/pull/4802"},{"name":"https://github.com/prebid/prebid-server/commit/494ac271cd4b5024df9123ef25ca3cff96390be3","tags":["x_refsource_MISC"],"url":"https://github.com/prebid/prebid-server/commit/494ac271cd4b5024df9123ef25ca3cff96390be3"},{"name":"https://github.com/prebid/prebid-server/releases/tag/v4.4.0","tags":["x_refsource_MISC"],"url":"https://github.com/prebid/prebid-server/releases/tag/v4.4.0"}],"affected":[{"vendor":"prebid","product":"prebid-server","versions":[{"version":"< 4.4.0","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-07-29T15:59:46.640Z"},"descriptions":[{"lang":"en","value":"Prebid Server is an open-source solution for running real-time advertising auctions in the cloud. Prior to version 4.4.0, certain bidder adapters in Prebid Server interpolate user-supplied parameters into outbound request URLs without properly validating host and subdomain values, allowing crafted bid request parameters to cause server-side requests to unintended destinations and potentially expose internal network services or sensitive server endpoints. This issue is fixed in version 4.4.0."}],"source":{"advisory":"GHSA-4p3g-4hcj-wpvx","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-29T18:04:08.706808Z","id":"CVE-2026-54735","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-07-29T18:04:18.670Z"}}]}}