{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-10303","assignerOrgId":"44488dab-36db-4358-99f9-bc116477f914","state":"PUBLISHED","assignerShortName":"runZero","dateReserved":"2026-05-31T21:05:04.476Z","datePublished":"2026-06-16T18:24:43.712Z","dateUpdated":"2026-06-17T15:18:11.930Z"},"containers":{"cna":{"providerMetadata":{"orgId":"44488dab-36db-4358-99f9-bc116477f914","shortName":"runZero","dateUpdated":"2026-06-16T18:24:43.712Z"},"title":"ServerCo getssl ACME shell script path injection","datePublic":"2026-06-16T18:20:00.000Z","problemTypes":[{"descriptions":[{"lang":"en","cweId":"CWE-73","description":"CWE-73 External control of file name or path","type":"CWE"}]}],"affected":[{"vendor":"ServerCo","product":"getssl","repo":"https://github.com/srvrco/getssl","versions":[{"status":"affected","version":"0","lessThanOrEqual":"2.49","versionType":"custom"}],"defaultStatus":"unaffected"}],"descriptions":[{"lang":"en","value":"In ServerCo getssl version 2.49 and prior, the ACME challenge token returned to the client was not strictly validated against RFC 8555 before being used in challenge-file handling, allowing a maliciously crafted token to influence local path/filename usage during validation. An attacker who can supply ACME challenge responses to getssl (for example, a malicious or compromised CA endpoint, or an on-path adversary able to tamper with that response path) could exploit this to achieve unauthorized file write/path traversal effects, usually with elevated privileges, ultimately allowing for remote command injection. This issue appears related in spirit to CVE-2023-38198, and is an instance of CWE-73, \"External control of file name or path.\" Other ACME shell script handlers may be affected by similar issues.","supportingMedia":[{"type":"text/html","base64":false,"value":"In ServerCo getssl version 2.49 and prior, the ACME challenge token returned to the client was not strictly validated against RFC 8555 before being used in challenge-file handling, allowing a maliciously crafted token to influence local path/filename usage during validation. An attacker who can supply ACME challenge responses to getssl (for example, a malicious or compromised CA endpoint, or an on-path adversary able to tamper with that response path) could exploit this to achieve unauthorized file write/path traversal effects, usually with elevated privileges, ultimately allowing for remote command injection. This issue appears related in spirit to CVE-2023-38198, and is an instance of CWE-73, \"External control of file name or path.\" Other ACME shell script handlers may be affected by similar issues."}]}],"references":[{"url":"https://github.com/srvrco/getssl/pull/896","tags":["mitigation"]},{"url":"https://remyhax.xyz/posts/reproducing-lawful-tls-wiretapping/","tags":["related"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2023-38198","tags":["related"]},{"url":"https://www.runzero.com/advisories/serverco-getssl-acme-cmd-injection-cve-2026-10303/","tags":["third-party-advisory"]},{"url":"https://github.com/srvrco/getssl/releases/tag/v2.50","tags":["release-notes"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"NONE","baseSeverity":"HIGH","baseScore":7.4,"vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N"}}],"credits":[{"lang":"en","value":"remy","type":"finder"},{"lang":"en","value":"Tod Beardsley of runZero","type":"coordinator"}],"source":{"discovery":"EXTERNAL"},"x_generator":{"engine":"Vulnogram 1.0.2"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-17T15:17:32.277126Z","id":"CVE-2026-10303","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-06-17T15:18:11.930Z"}}]}}