CVE-2026-5052

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{"bugzilla": {"description": "Vault: Vault: Information disclosure via Server-Side Request Forgery in ACME challenge validation", "id": "2459106", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2459106"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.8", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N", "status": "draft"}, "cwe": "CWE-918", "details": ["A flaw was found in Vault\u2019s PKI engine. The ACME (Automated Certificate Management Environment) validation process did not properly restrict requests to local network targets when handling http-01 and tls-alpn-01 challenges. This vulnerability, known as Server-Side Request Forgery (SSRF), could allow a remote attacker to send crafted ACME validation challenges, potentially leading to the disclosure of sensitive information from internal network resources."], "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-2026-5052", "package_state": [{"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift4/ose-baremetal-installer-rhel9", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift4/ose-installer-rhel9", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift_data_foundation:4", "fix_state": "Fix deferred", "package_name": "cephcsi-rhel8", "product_name": "Red Hat Openshift Data Foundation 4"}, {"cpe": "cpe:/a:redhat:openshift_data_foundation:4", "fix_state": "Fix deferred", "package_name": "cephcsi-rhel9", "product_name": "Red Hat Openshift Data Foundation 4"}, {"cpe": "cpe:/a:redhat:openshift_data_foundation:4", "fix_state": "Fix deferred", "package_name": "mcg-cli-rhel9", "product_name": "Red Hat Openshift Data Foundation 4"}, {"cpe": "cpe:/a:redhat:openshift_data_foundation:4", "fix_state": "Fix deferred", "package_name": "mcg-rhel8-operator", "product_name": "Red Hat Openshift Data Foundation 4"}, {"cpe": "cpe:/a:redhat:openshift_data_foundation:4", "fix_state": "Fix deferred", "package_name": "mcg-rhel9-operator", "product_name": "Red Hat Openshift Data Foundation 4"}, {"cpe": "cpe:/a:redhat:openshift_data_foundation:4", "fix_state": "Fix deferred", "package_name": "ocs4/cephcsi-rhel8", "product_name": "Red Hat Openshift Data Foundation 4"}, {"cpe": "cpe:/a:redhat:openshift_data_foundation:4", "fix_state": "Fix deferred", "package_name": "odf4/cephcsi-rhel8", "product_name": "Red Hat Openshift Data Foundation 4"}, {"cpe": "cpe:/a:redhat:openshift_data_foundation:4", "fix_state": "Fix deferred", "package_name": "odf4/cephcsi-rhel9", "product_name": "Red Hat Openshift Data Foundation 4"}, {"cpe": "cpe:/a:redhat:openshift_data_foundation:4", "fix_state": "Fix deferred", "package_name": "odf4/mcg-cli-rhel9", "product_name": "Red Hat Openshift Data Foundation 4"}, {"cpe": "cpe:/a:redhat:openshift_data_foundation:4", "fix_state": "Fix deferred", "package_name": "odf4/mcg-rhel8-operator", "product_name": "Red Hat Openshift Data Foundation 4"}, {"cpe": "cpe:/a:redhat:openshift_data_foundation:4", "fix_state": "Fix deferred", "package_name": "odf4/mcg-rhel9-operator", "product_name": "Red Hat Openshift Data Foundation 4"}], "public_date": "2026-04-17T02:55:25Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-5052\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-5052\nhttps://discuss.hashicorp.com/t/hcsec-2026-06-vault-vulnerable-to-server-side-request-forgery-in-acme-challenge-validation-via-attacker-controlled-dns/77343"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": ["64_bit", "32_bit", "x86", "arm", "macos", "windows", "linux"], "status": "affected", "versions": {"scheme": "semver", "value": "[1.15.0,2.0.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Vault", "source": "cna", "vendor": "HashiCorp"}, "product": "vault", "vendor": "hashicorp"}, {"configurations": [{"platform": ["64_bit", "32_bit", "x86", "arm", "macos", "windows", "linux"], "status": "affected", "versions": {"scheme": "semver", "value": "[1.15.0,1.19.16)"}}, {"platform": ["64_bit", "32_bit", "x86", "arm", "macos", "windows", "linux"], "status": "unaffected", "versions": {"scheme": "semver", "value": "[1.19.16,1.20.10)"}}, {"platform": ["64_bit", "32_bit", "x86", "arm", "macos", "windows", "linux"], "status": "unaffected", "versions": {"scheme": "semver", "value": "[1.20.10,1.21.5)"}}, {"platform": ["64_bit", "32_bit", "x86", "arm", "macos", "windows", "linux"], "status": "unaffected", "versions": {"scheme": "semver", "value": "[1.21.5,2.0.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Vault Enterprise", "source": "cna", "vendor": "HashiCorp"}, "product": "vault_enterprise", "vendor": "hashicorp"}], "analysis": {"en": {"generated_at": "2026-04-17T04:50:42.315251+00:00", "value": {"mitigation_remediation": ["Upgrade Vault to version 2.0.0 or later, or to Enterprise 1.21.5, 1.20.10, or 1.19.16 if already using those specific releases", "If an upgrade is not immediately possible, temporarily disable ACME challenge validation in the Vault PKI configuration", "Configure network segmentation or firewall rules to prevent internal services from responding to requests originating from Vault\u2019s ACME validation process"], "summary": {"action": "Immediate Patch", "impact": "Server-Side Request Forgery (SSRF) leading to potential information disclosure"}, "threat_synthesis": {"affected_systems": "The vulnerability affects HashiCorp Vault Community Edition 2.0.0 and Vault Enterprise 2.0.0 as well as earlier Enterprise releases 1.21.5, 1.20.10, and 1.19.16. Any deployment of these versions that performs ACME challenge validation is potentially exposed.", "description_and_impact": "Vault\u2019s PKI engine allowed ACME http-01 and tls-alpn-01 challenges to be validated against local or attacker\u2011controlled DNS targets. This flaw permits the server to issue HTTP requests to internal services, exposing sensitive data that should remain unavailable to external clients.", "risk_and_exploitability": "The CVSS score of 5.3 indicates a moderate impact. No EPSS data is available, and the vulnerability is not listed in the CISA KEV catalog, suggesting an unknown exploitation probability. The likely attack vector involves manipulating DNS for a domain used in ACME challenge validation, enabling an attacker to direct Vault\u2019s internal request to a local resource. The potential impact is data leakage from internal services vulnerable to SSRF."}}}}, "created": "2026-04-17T05:00:05.420115+00:00", "updated": "2026-04-17T05:00:05.502022+00:00", "vendors": ["hashicorp", "hashicorp$PRODUCT$vault", "hashicorp$PRODUCT$vault_enterprise"]}