CVE-2026-17566
pgAdmin 4: pgAdmin 4: Remote Code Execution via backslash-escape mismatch in Import/Export Data tool
Sévérité par source
Le label propre à Trivy est CRITICAL. Critique selon Red Hat.
Description
pgAdmin 4's Import/Export Data tool builds a psql \copy (...) command line by interpolating a user-supplied SQL query into a Jinja template and passing the rendered line to psql via --command. To stop an attacker from breaking out of the (...) wrapper, create_import_export_job() (route POST /import_export/job/<sid>, gated only by the ordinary, commonly-granted tools_import_export_data permission) validated the query with a hand-written parenthesis-balance checker, _is_query_parens_balanced(). That checker always treated a backslash before a single quote (\') as escaping the quote, i.e. as if standard_conforming_strings were off. PostgreSQL has defaulted standard_conforming_strings to on since 9.1 (2010), the default on every PostgreSQL version pgAdmin 4 currently supports (13-18); under that default psql's own \copy tokenizer treats \ as an ordinary character, so a single quote immediately after it closes the string literal. A query such as SELECT 'a\') TO PROGRAM 'echo pwned' x' was therefore accepted as "balanced" by pgAdmin's checker (which believed the ) was still inside the string), while psql, run through the actual rendered command line, closes the string at that point and treats the following ) as the end of the wrapping \copy (...) subquery, exposing an attacker-chosen TO PROGRAM '<command>' clause that psql executes via popen() -- independent of a subsequent syntax error later on the same line. This is the same class of bug as CVE-2025-12762/CVE-2025-13780 (RCE via psql meta-command/COPY injection during PLAIN-format dump restore), reached through an independently written defense in a different module (Import/Export Data rather than Restore) that had its own, different logic bug (inverted backslash-escape semantics rather than a BOM-defeated regex anchor). The fix rejects any backslash inside a single-quoted string in the query outright, rather than picking one of the two possible psql interpretations. This is intentionally conservative: because the correct interpretation of \ depends on the target server's standard_conforming_strings setting, which the checker cannot reliably know at validation time, refusing the query is safer than guessing. This issue affects pgAdmin 4: from the introduction of _is_query_parens_balanced() before 9.18.
Paquets affectés et versions corrigées
| Source | Paquet | Corrigé en |
|---|---|---|
| chainguard | pgadmin4 | 9.18-r0 |
| rapidfort fedora 43 | pgadmin4, pgadmin4-doc, pgadmin4-httpd et 10 autres | 9.17-1.fc43 |
Afficher les 14 entrées de 2 sources
| Source | Paquet | Corrigé en |
|---|---|---|
| chainguard | pgadmin4 | 9.18-r0 |
| rapidfort fedora 43 | pgadmin4 | 9.17-1.fc43 |
| rapidfort fedora 43 | pgadmin4-doc | 9.17-1.fc43 |
| rapidfort fedora 43 | pgadmin4-httpd | 9.17-1.fc43 |
| rapidfort fedora 43 | pgadmin4-langpack-cs | 9.17-1.fc43 |
| rapidfort fedora 43 | pgadmin4-langpack-de | 9.17-1.fc43 |
| rapidfort fedora 43 | pgadmin4-langpack-es | 9.17-1.fc43 |
| rapidfort fedora 43 | pgadmin4-langpack-fr | 9.17-1.fc43 |
| rapidfort fedora 43 | pgadmin4-langpack-it | 9.17-1.fc43 |
| rapidfort fedora 43 | pgadmin4-langpack-ja | 9.17-1.fc43 |
| rapidfort fedora 43 | pgadmin4-langpack-ko | 9.17-1.fc43 |
| rapidfort fedora 43 | pgadmin4-langpack-pl | 9.17-1.fc43 |
| rapidfort fedora 43 | pgadmin4-langpack-ru | 9.17-1.fc43 |
| rapidfort fedora 43 | pgadmin4-qt | 9.17-1.fc43 |