CVE-2026-17347
- Source
- https://cve.org/CVERecord?id=CVE-2026-17347
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-17347.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-17347
- Published
- 2026-07-31T15:59:16.588Z
- Modified
- 2026-08-02T03:47:19.700078274Z
- Severity
-
- 7.7 (High) CVSS_V4 - 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 CVSS Calculator
- Summary
- pgAdmin 4: OS command injection in MASTER_PASSWORD_HOOK via untrusted username substitution
- Details
-
The MASTERPASSWORDHOOK 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.
Fix 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 MASTERPASSWORDHOOK 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.
This issue affects pgAdmin 4: from 7.2 before 9.17.
- Database specific
{ "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/17xxx/CVE-2026-17347.json", "unresolved_ranges": [ { "source": "AFFECTED_FIELD", "extracted_events": [ { "introduced": "7.2" }, { "fixed": "9.17" } ] }, { "source": "DESCRIPTION", "extracted_events": [ { "introduced": "7.2" }, { "fixed": "9.17" } ] } ], "cna_assigner": "PostgreSQL", "cwe_ids": [ "CWE-78", "CWE-88" ] }- References
-
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/17xxx/CVE-2026-17347.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-17347
- https://github.com/pgadmin-org/pgadmin4/issues/10191
- https://github.com/pgadmin-org/pgadmin4/commit/e7a85767314e7b0fe0b35fe80b9c1af38f48dff6
- https://github.com/pgadmin-org/pgadmin4/commit/ea7e798aac27174d2bacee1d6e136bed76a95e23
- https://github.com/pgadmin-org/pgadmin4