CVE-2026-55787

{"id": "CVE-2026-55787", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-55787", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-10-15T14:54:19.186468Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 7.1, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 4.7, "exploitabilityScore": 1.8}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "flytohub", "product": "flyto-core", "versions": [{"status": "affected", "version": "< 2.26.3"}]}]}], "published": "2026-10-14T19:17:17.927", "references": [{"url": "https://github.com/flytohub/flyto-core/commit/519e040384a74984848c4e84a6600e5f1020a6d2", "source": "security-advisories@github.com"}, {"url": "https://github.com/flytohub/flyto-core/pull/20", "source": "security-advisories@github.com"}, {"url": "https://github.com/flytohub/flyto-core/releases/tag/v2.26.3", "source": "security-advisories@github.com"}, {"url": "https://github.com/flytohub/flyto-core/security/advisories/GHSA-794r-5rp2-fpg8", "source": "security-advisories@github.com"}, {"url": "https://github.com/flytohub/flyto-core/security/advisories/GHSA-794r-5rp2-fpg8", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-918"}]}], "descriptions": [{"lang": "en", "value": "Flyto2 Core is an execution kernel for automation and AI-agent workflows. Prior to 2.26.3, validate_url_ssrf and is_private_ip in src/core/utils.py compare resolved addresses only against native private IPv4 and IPv6 ranges and do not unwrap IPv4-mapped, IPv4-compatible, 6to4, or NAT64 transition addresses. An authenticated workflow author can provide a transition-form literal URL through the Execution API POST /v1/execute route, http.get, or sibling guarded outbound-request modules, causing the guard to accept an address whose embedded IPv4 points to loopback, RFC 1918, or cloud metadata services. On a host that routes the selected transition form, the outbound request reaches the internal destination and returns the response body to the workflow caller, enabling read SSRF and disclosure of internal-service data or cloud credentials. This issue is fixed in version 2.26.3."}], "lastModified": "2026-10-16T20:04:29.760", "sourceIdentifier": "security-advisories@github.com"}