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From: Noah Misch <[email protected]>
To: [email protected]
Subject: pgsql: pg_createsubscriber: Obstruct SQL injection via subscription nam
Date: Mon, 11 May 2026 12:19:37 +0000
Message-ID: <[email protected]> (raw)

pg_createsubscriber: Obstruct SQL injection via subscription names.

drop_existing_subscription() neglected to escape the subscription
name when generating its query string.  To fix, use
PQescapeIdentifier() to construct a properly escaped name, and use
it in the ALTER SUBSCRIPTION and DROP SUBSCRIPTION commands.

Reported-by: Yu Kunpeng <[email protected]>
Author: Nathan Bossart <[email protected]>
Reviewed-by: Amit Kapila <[email protected]>
Security: CVE-2026-6476
Backpatch-through: 17

Branch
------
master

Details
-------
https://git.postgresql.org/pg/commitdiff/d389415ffad509f0de1342e6ebbb5d5c62dbedef
Author: Nathan Bossart <[email protected]>

Modified Files
--------------
src/bin/pg_basebackup/pg_createsubscriber.c | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)

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