{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-123207", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-11-05T17:58:52.271Z", "datePublished": "2026-11-05T18:16:41.817Z", "dateUpdated": "2026-11-05T18:16:41.817Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-11-05T18:16:41.817Z"}, "datePublic": "2026-10-19T00:00:00.000Z", "title": "LibreTV before v2.21.2 SSRF Protection Bypass via DNS Rebinding", "descriptions": [{"lang": "en", "value": "LibreTV before v2.21.2 contains a server-side request forgery vulnerability that allows authenticated users to bypass checkUpstreamAllowed() by exploiting unpinned DNS resolution in fetchWithSafeRedirects(). Attackers controlling authoritative DNS can return public addresses during validation and internal addresses at connection time via /api/source/test, /api/proxy, /api/search or /api/detail to reach loopback services, private hosts or cloud metadata endpoints."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "Time-of-check Time-of-use (TOCTOU) Race Condition", "cweId": "CWE-367", "type": "CWE"}]}], "affected": [{"vendor": "LibreSpark", "product": "LibreTV", "defaultStatus": "unaffected", "versions": [{"version": "0", "lessThan": "v2.21.2", "status": "affected", "versionType": "custom"}], "packageURL": "pkg:github/librespark/libretv", "repo": "https://github.com/LibreSpark/LibreTV"}], "metrics": [{"format": "CVSS", "cvssV4_0": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "LOW", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 2.3, "baseSeverity": "LOW"}}, {"format": "CVSS", "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "availabilityImpact": "NONE", "baseScore": 3.1, "baseSeverity": "LOW"}}], "references": [{"url": "https://github.com/LibreSpark/LibreTV/issues/941", "tags": ["issue-tracking"]}, {"url": "https://github.com/LibreSpark/LibreTV/pull/960", "tags": ["patch", "issue-tracking"]}, {"url": "https://github.com/LibreSpark/LibreTV/commit/cb4219368b7f6502387a703ef2a781ba763da2b1", "tags": ["patch"]}, {"url": "https://github.com/LibreSpark/LibreTV/releases/tag/v2.21.2", "tags": ["release-notes"], "name": "LibreTV v2.21.2 Release Notes"}, {"url": "https://github.com/LibreSpark/LibreTV/blob/29cbeb3d37b4876f909a0354087a3531af0447f6/src/lib/ssrf.ts#L56-L85", "tags": ["technical-description"]}, {"name": "VulnCheck Advisory: LibreTV before v2.21.2 SSRF Protection Bypass via DNS Rebinding", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/libretv-before-2.21.2-ssrf-protection-bypass-via-dns-rebinding"}], "credits": [{"lang": "en", "value": "George Chen", "type": "finder"}, {"lang": "en", "value": "Gaoshou101", "type": "remediation developer"}], "x_generator": {"engine": "vulncheck-endgame"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "packageURL": "pkg:github/librespark/libretv", "product": "LibreTV", "repo": "https://github.com/LibreSpark/LibreTV", "vendor": "LibreSpark", "versions": [{"lessThan": "v2.21.2", "status": "affected", "version": "0", "versionType": "custom"}]}], "source": "disclosure@vulncheck.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "LibreTV before v2.21.2 contains a server-side request forgery vulnerability that allows authenticated users to bypass checkUpstreamAllowed() by exploiting unpinned DNS resolution in fetchWithSafeRedirects(). Attackers controlling authoritative DNS can return public addresses during validation and internal addresses at connection time via /api/source/test, /api/proxy, /api/search or /api/detail to reach loopback services, private hosts or cloud metadata endpoints."}], "id": "CVE-2026-123207", "lastModified": "2026-11-05T19:17:20.217", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 3.1, "baseSeverity": "LOW", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 1.6, "impactScore": 1.4, "source": "disclosure@vulncheck.com", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 2.3, "baseSeverity": "LOW", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "LOW", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "disclosure@vulncheck.com", "type": "Secondary"}]}, "published": "2026-11-05T19:17:20.217", "references": [{"source": "disclosure@vulncheck.com", "url": "https://github.com/LibreSpark/LibreTV/blob/29cbeb3d37b4876f909a0354087a3531af0447f6/src/lib/ssrf.ts#L56-L85"}, {"source": "disclosure@vulncheck.com", "url": "https://github.com/LibreSpark/LibreTV/commit/cb4219368b7f6502387a703ef2a781ba763da2b1"}, {"source": "disclosure@vulncheck.com", "url": "https://github.com/LibreSpark/LibreTV/issues/941"}, {"source": "disclosure@vulncheck.com", "url": "https://github.com/LibreSpark/LibreTV/pull/960"}, {"source": "disclosure@vulncheck.com", "url": "https://github.com/LibreSpark/LibreTV/releases/tag/v2.21.2"}, {"source": "disclosure@vulncheck.com", "url": "https://www.vulncheck.com/advisories/libretv-before-2.21.2-ssrf-protection-bypass-via-dns-rebinding"}], "sourceIdentifier": "disclosure@vulncheck.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-367"}], "source": "disclosure@vulncheck.com", "type": "Primary"}]}

{"bugzilla": {"description": "libretv: LibreTV: Server-Side Request Forgery via unpinned DNS resolution", "id": "2567581", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2567581"}, "csaw": false, "cvss3": {"cvss3_base_score": "3.1", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N", "status": "draft"}, "cwe": "CWE-918", "details": ["A flaw was found in LibreTV. This flaw allows an authenticated remote attacker to bypass Server-Side Request Forgery (SSRF) protections, potentially leading to unauthorized access to internal services or information disclosure. By exploiting unpinned Domain Name System (DNS) resolution, an attacker controlling an external DNS server can return an allowed public address during initial validation and an internal address when the connection is established. As a result, the attacker can force the server to send unauthorized requests to internal hosts, loopback services, or cloud metadata endpoints."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability."}, "name": "CVE-2026-123207", "public_date": "2026-11-05T18:16:41Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-123207\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-123207\nhttps://github.com/LibreSpark/LibreTV/blob/29cbeb3d37b4876f909a0354087a3531af0447f6/src/lib/ssrf.ts#L56-L85\nhttps://github.com/LibreSpark/LibreTV/commit/cb4219368b7f6502387a703ef2a781ba763da2b1\nhttps://github.com/LibreSpark/LibreTV/issues/941\nhttps://github.com/LibreSpark/LibreTV/pull/960\nhttps://github.com/LibreSpark/LibreTV/releases/tag/v2.21.2\nhttps://www.vulncheck.com/advisories/libretv-before-2.21.2-ssrf-protection-bypass-via-dns-rebinding"], "statement": "This vulnerability is rated as Low severity because successful exploitation requires authenticated access and complex DNS rebinding timing against an external authoritative server, limiting impact to internal read requests. Additionally, LibreTV is not included or supported across Red Hat enterprise products, meaning default installations are unaffected.", "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,v2.21.2)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "LibreTV", "source": "cna", "vendor": "LibreSpark"}, "product": "libretv", "vendor": "librespark"}], "created": "2026-11-05T20:00:09.808681+00:00", "updated": "2026-11-06T16:35:25.395900+00:00", "vendors": ["librespark", "librespark$PRODUCT$libretv"]}