{"id":"CVE-2026-5052","sourceIdentifier":"security@hashicorp.com","published":"2026-04-17T04:16:12.567","lastModified":"2026-06-17T10:58:20.573","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"Vault’s PKI engine’s ACME validation did not reject local targets when issuing http-01 and tls-alpn-01 challenges. This may lead to these requests being sent to local network targets, potentially leading to information disclosure. Fixed in Vault Community Edition 2.0.0 and Vault Enterprise 2.0.0, 1.21.5, 1.20.10, and 1.19.16."}],"affected":[{"source":"security@hashicorp.com","affectedData":[{"vendor":"HashiCorp","product":"Vault","defaultStatus":"unaffected","platforms":["64 bit","32 bit","x86","ARM","MacOS","Windows","Linux"],"repo":"https://github.com/hashicorp/vault","versions":[{"version":"1.15.0","lessThan":"2.0.0","versionType":"semver","status":"affected"}]},{"vendor":"HashiCorp","product":"Vault Enterprise","defaultStatus":"unaffected","platforms":["64 bit","32 bit","x86","ARM","MacOS","Windows","Linux"],"repo":"https://github.com/hashicorp/vault","versions":[{"version":"1.15.0","lessThan":"2.0.0","versionType":"semver","status":"affected","changes":[{"at":"1.19.16","status":"unaffected"},{"at":"1.20.10","status":"unaffected"},{"at":"1.21.5","status":"unaffected"}]}]}]}],"metrics":{"cvssMetricV31":[{"source":"security@hashicorp.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","baseScore":5.3,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"NONE","availabilityImpact":"NONE"},"exploitabilityScore":3.9,"impactScore":1.4},{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N","baseScore":8.6,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"NONE"},"exploitabilityScore":3.9,"impactScore":4.0}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-04-17T13:19:57.168697Z","id":"CVE-2026-5052","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security@hashicorp.com","type":"Secondary","description":[{"lang":"en","value":"CWE-918"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:hashicorp:vault:*:*:*:*:enterprise:*:*:*","versionStartIncluding":"1.14.0","versionEndExcluding":"1.19.16","matchCriteriaId":"5EF70F5F-D939-4808-9F03-57745D1333B3"},{"vulnerable":true,"criteria":"cpe:2.3:a:hashicorp:vault:*:*:*:*:-:*:*:*","versionStartIncluding":"1.14.0","versionEndExcluding":"2.0.0","matchCriteriaId":"64F0763E-552C-4882-A66F-D7CE8D13B7CD"},{"vulnerable":true,"criteria":"cpe:2.3:a:hashicorp:vault:*:*:*:*:enterprise:*:*:*","versionStartIncluding":"1.20.0","versionEndExcluding":"1.20.10","matchCriteriaId":"E2135CCF-F6D8-41AC-8D0C-F763F63974B4"},{"vulnerable":true,"criteria":"cpe:2.3:a:hashicorp:vault:*:*:*:*:enterprise:*:*:*","versionStartIncluding":"1.21.0","versionEndExcluding":"1.21.5","matchCriteriaId":"C8097BD2-0B19-4BA7-930E-93A5A89EC4AF"}]}]}],"references":[{"url":"https://discuss.hashicorp.com/t/hcsec-2026-06-vault-vulnerable-to-server-side-request-forgery-in-acme-challenge-validation-via-attacker-controlled-dns/77343","source":"security@hashicorp.com","tags":["Vendor Advisory"]}]}