{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-17347", "assignerOrgId": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007", "state": "PUBLISHED", "assignerShortName": "PostgreSQL", "dateReserved": "2026-07-25T02:52:54.844Z", "datePublished": "2026-07-31T15:59:16.588Z", "dateUpdated": "2026-08-01T03:56:12.755Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007", "shortName": "PostgreSQL", "dateUpdated": "2026-07-31T15:59:16.588Z" }, "title": "pgAdmin 4: OS command injection in MASTER_PASSWORD_HOOK via untrusted username substitution", "affected": [ { "vendor": "pgadmin.org", "product": "pgAdmin 4", "repo": "https://github.com/pgadmin-org/pgadmin4", "modules": [ "Master Password Hook" ], "programFiles": [ "https://github.com/pgadmin-org/pgadmin4/blob/master/web/pgadmin/utils/master_password.py", "https://github.com/pgadmin-org/pgadmin4/blob/master/web/config.py" ], "versions": [ { "status": "affected", "version": "7.2", "lessThan": "9.17", "versionType": "custom" } ], "defaultStatus": "unaffected" } ], "descriptions": [ { "lang": "en", "value": "The MASTER_PASSWORD_HOOK setting, introduced in pgAdmin 4 7.2, lets an administrator configure an external command that returns a per-user encryption key, with %u in the configured string replaced by the current user's name. The previous implementation substituted the username directly into the command string and executed the result with subprocess.Popen(..., shell=True). Because the username can originate from an external authentication source (OAuth/OIDC claims, Kerberos, webserver auth) rather than a value pgAdmin fully controls, a username containing shell metacharacters (';', '$()', backticks, pipes, '&&', newlines) allowed an authenticated user to execute arbitrary commands as the pgAdmin service account in any deployment where the configured hook string uses %u.\n\nFix tokenises the trusted, administrator-configured hook string into an argument vector first (using shlex in POSIX-quoting mode, with backslash-escaping disabled so Windows-style paths are not mis-parsed), substitutes the untrusted username into the individual argv elements, and executes with shell=False. The username is therefore always confined to a single argv element; any shell metacharacters it contains are inert. Administrators whose MASTER_PASSWORD_HOOK previously relied on shell features (pipes, redirection, environment-variable expansion, globbing) within the hook string itself must move that logic into the invoked script, since it is no longer interpreted by a shell.\n\nThis issue affects pgAdmin 4: from 7.2 before 9.17." } ], "references": [ { "url": "https://github.com/pgadmin-org/pgadmin4/issues/10191", "tags": [ "issue-tracking" ] }, { "url": "https://github.com/pgadmin-org/pgadmin4/commit/ea7e798aac27174d2bacee1d6e136bed76a95e23", "tags": [ "patch" ] }, { "url": "https://github.com/pgadmin-org/pgadmin4/commit/e7a85767314e7b0fe0b35fe80b9c1af38f48dff6", "tags": [ "patch" ] } ], "metrics": [ { "format": "CVSS", "scenarios": [ { "lang": "en", "value": "Threat model (per reporter's submitted rating): an authenticated pgAdmin user whose username is sourced from an external identity provider (OAuth/OIDC, Kerberos, or webserver auth passed through to pgAdmin) in a deployment where MASTER_PASSWORD_HOOK's configured string contains %u. Attack Complexity is High because exploitation depends on this non-default configuration (hook enabled with %u, combined with an external-auth username source under attacker influence) rather than being reachable in a default deployment. Scope is Unchanged: the resulting command execution runs as the pgAdmin service account, which is the same security authority the web application process itself already runs under -- it is a consequence of pgAdmin's own process, not a boundary crossing into an unrelated authority. Confidentiality/Integrity/Availability are High because arbitrary command execution as that account can read, modify, or destroy anything the account can reach." } ], "cvssV3_1": { "version": "3.1", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "baseSeverity": "HIGH", "baseScore": 7.5, "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H" } }, { "format": "CVSS", "scenarios": [ { "lang": "en", "value": "Same reasoning as the CVSS 3.1 entry: authenticated low-privilege user with an externally-sourced username triggers arbitrary OS command execution as the pgAdmin service account, contingent on the non-default MASTER_PASSWORD_HOOK/%u configuration (AT:N here refers to no additional authentication target beyond the login itself; the configuration dependency is captured via AC:H in the 3.1 vector and is implicit in this scenario). VC:H/VI:H/VA:H for the service account's own reach; SC:N/SI:N/SA:N since that reach is the application's own process authority, not a distinct subsequent system." } ], "cvssV4_0": { "version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N", "baseScore": 7.7, "baseSeverity": "HIGH" } } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "description": "CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')", "cweId": "CWE-78", "type": "CWE" }, { "lang": "en", "description": "CWE-88 Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')", "cweId": "CWE-88", "type": "CWE" } ] } ], "credits": [ { "lang": "en", "value": "Thiago Pereira (@B1gN0Se)", "type": "finder" }, { "lang": "en", "value": "Dave Page ", "type": "remediation developer" }, { "lang": "en", "value": "Ashesh Vashi ", "type": "remediation developer" }, { "lang": "en", "value": "Ashesh Vashi ", "type": "remediation reviewer" }, { "lang": "en", "value": "Kundan Sable ", "type": "remediation reviewer" } ], "source": { "discovery": "EXTERNAL" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2026-07-31T00:00:00+00:00", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "role": "CISA Coordinator", "version": "2.0.3", "id": "CVE-2026-17347" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-08-01T03:56:12.755Z" } } ] } }