psql: Don't do backquote expansion in \unrestrict. This oversight in commit 71ea0d6795 allows a malicious server to inject shell commands into plain-text dump output that are run at restore time on the machine running psql. To fix, interpret all text after \unrestrict until the end of the line as its argument.
Reported-by: Lucas Velgus <[email protected]> Reported-by: Filip Janus <[email protected]> Reported-by: Daniel Bakker <[email protected]> Author: Nathan Bossart <[email protected]> Reviewed-by: Robert Haas <[email protected]> Reviewed-by: Noah Misch <[email protected]> Security: CVE-2026-18408 Backpatch-through: 14 Branch ------ REL_16_STABLE Details ------- https://git.postgresql.org/pg/commitdiff/33d0c63fb345f6b06893610a4a19644dd2450262 Author: Nathan Bossart <[email protected]> Modified Files -------------- doc/src/sgml/ref/psql-ref.sgml | 5 +++++ src/bin/psql/command.c | 19 +++++++++++++++++-- src/bin/psql/t/001_basic.pl | 7 +++++++ 3 files changed, 29 insertions(+), 2 deletions(-)
