{"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": "2026-06-16T18:24:43.712Z"}, "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"}}}}

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{"cveTags": [], "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."}], "id": "CVE-2026-10303", "lastModified": "2026-06-16T20:47:43.440", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.4, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 5.2, "source": "44488dab-36db-4358-99f9-bc116477f914", "type": "Secondary"}]}, "published": "2026-06-16T20:16:26.963", "references": [{"source": "44488dab-36db-4358-99f9-bc116477f914", "url": "https://github.com/srvrco/getssl/pull/896"}, {"source": "44488dab-36db-4358-99f9-bc116477f914", "url": "https://github.com/srvrco/getssl/releases/tag/v2.50"}, {"source": "44488dab-36db-4358-99f9-bc116477f914", "url": "https://remyhax.xyz/posts/reproducing-lawful-tls-wiretapping/"}, {"source": "44488dab-36db-4358-99f9-bc116477f914", "url": "https://www.cve.org/CVERecord?id=CVE-2023-38198"}, {"source": "44488dab-36db-4358-99f9-bc116477f914", "url": "https://www.runzero.com/advisories/serverco-getssl-acme-cmd-injection-cve-2026-10303/"}], "sourceIdentifier": "44488dab-36db-4358-99f9-bc116477f914", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-73"}], "source": "44488dab-36db-4358-99f9-bc116477f914", "type": "Secondary"}]}

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