{"id":"CVE-2026-10303","summary":"ServerCo getssl ACME shell script path injection","details":"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.","modified":"2026-07-08T08:12:22.445319646Z","published":"2026-06-16T18:24:43.712Z","database_specific":{"cna_assigner":"runZero","cwe_ids":["CWE-73"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/10xxx/CVE-2026-10303.json"},"references":[{"type":"WEB","url":"https://remyhax.xyz/posts/reproducing-lawful-tls-wiretapping/"},{"type":"WEB","url":"https://www.cve.org/CVERecord?id=CVE-2023-38198"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/10xxx/CVE-2026-10303.json"},{"type":"ADVISORY","url":"https://github.com/srvrco/getssl/releases/tag/v2.50"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-10303"},{"type":"ADVISORY","url":"https://www.runzero.com/advisories/serverco-getssl-acme-cmd-injection-cve-2026-10303/"},{"type":"FIX","url":"https://github.com/srvrco/getssl/pull/896"},{"type":"PACKAGE","url":"https://github.com/srvrco/getssl"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/srvrco/getssl","events":[{"introduced":"0"},{"fixed":"b0b856df1eb1265ce56785eb1d2af880669b8788"}],"database_specific":{"source":["AFFECTED_FIELD","REFERENCES"],"extracted_events":[{"introduced":"0"},{"last_affected":"2.49"}]}}],"versions":["2.50","v2.49","2.49","2.48","v2.47","v2.46","v2.45","v2.44","v2.43","v2.41","v2.39","v2.38","v2.37","push","v2.36","v2.35","v2.34","v2.33","v2.32","v2.31","v2.30","v2.29","2.29","v2.28","v2.27","v2.26","v2.24","v2.22","v2.21","v2.20","v2.19","v2.18","v2.17","v2.16","v2.15","v2.14","v2.13","v2.12","v2.11","v2.10","v2.09","v2.03","v2.00","v1.92","v1.87","v1.85","v1.84","v1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-10303.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N"}]}