PostgreSQL Buffer Overrun via Char Valid. (18.2/17.8/16.12/15.16/14.21)
CVE-2026-2006 Published on February 12, 2026
PostgreSQL missing validation of multibyte character length executes arbitrary code
Missing validation of multibyte character length in PostgreSQL text manipulation allows a database user to issue crafted queries that achieve a buffer overrun. That suffices to execute arbitrary code as the operating system user running the database. Versions before PostgreSQL 18.2, 17.8, 16.12, 15.16, and 14.21 are affected.
Vulnerability Analysis
CVE-2026-2006 is exploitable with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be very high.
Weakness Types
What is an out-of-bounds array index Vulnerability?
The product uses untrusted input when calculating or using an array index, but the product does not validate or incorrectly validates the index to ensure the index references a valid position within the array.
CVE-2026-2006 has been classified to as an out-of-bounds array index vulnerability or weakness.
Improper Validation of Specified Index, Position, or Offset in Input
The product receives input that is expected to specify an index, position, or offset into an indexable resource such as a buffer or file, but it does not validate or incorrectly validates that the specified index/position/offset has the required properties.
Products Associated with CVE-2026-2006
You can be notified by email with stack.watch whenever vulnerabilities like CVE-2026-2006 are published in these products:
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.