CVE-2026-47699

{"id": "CVE-2026-47699", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-47699", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-08-21T19:17:03.503833Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 6.4, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "LOW"}, "impactScore": 2.7, "exploitabilityScore": 3.1}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "confidential-containers", "product": "guest-components", "versions": [{"status": "affected", "version": ">= 0.16.0, < 0.20.0"}]}]}], "published": "2026-08-18T22:16:52.127", "references": [{"url": "https://github.com/confidential-containers/guest-components/commit/14fbb711af0b29bb9cad307969d57b0de9b85d7f", "source": "security-advisories@github.com"}, {"url": "https://github.com/confidential-containers/guest-components/commit/7cc1bc458973310296e58aedbb15cb7963297bbe", "source": "security-advisories@github.com"}, {"url": "https://github.com/confidential-containers/guest-components/pull/1440", "source": "security-advisories@github.com"}, {"url": "https://github.com/confidential-containers/guest-components/pull/1457", "source": "security-advisories@github.com"}, {"url": "https://github.com/confidential-containers/guest-components/releases/tag/v0.20.0", "source": "security-advisories@github.com"}, {"url": "https://github.com/confidential-containers/guest-components/security/advisories/GHSA-84rc-2q4r-45pc", "source": "security-advisories@github.com"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-22"}, {"lang": "en", "value": "CWE-59"}]}], "descriptions": [{"lang": "en", "value": "Confidential Containers Guest Components provides guest tools and components for confidential container workloads. From 0.16.0 until 0.20.0, a crafted OCI image layer can make image_rs::stream::unpack::unpack() create a hardlink outside its destination directory. In image-rs/src/stream/unpack.rs, try_hardlink_fallback() validates the hardlink source but computes the destination with destination.join(&entry_rel). Rust Path::join replaces the base when entry_rel is an absolute tar entry path, so fs::hard_link(&src_canon, &dst_entry_abs) can write attacker-controlled content to an arbitrary absolute path. In Confidential Containers the workload owner already controls trusted image content, so the issue is a workload-owner escape into the pod virtual machine rather than a crossing of the image trust boundary, but it may enable access to pod virtual machine capabilities and attestation abuse. This issue is fixed in version 0.20.0."}], "lastModified": "2026-09-09T21:13:25.910", "sourceIdentifier": "security-advisories@github.com"}