PostgreSQL multibyte character length validation RCE
CVE-2026-2006 is an arbitrary code execution vulnerability in PostgreSQL caused by missing validation of multibyte character length during text manipulation. The flaw allows malformed multibyte input, including malformed UTF-8 as described in supporting reporting, to reach PostgreSQL string-handling routines such as pg_mblen and pg_utf_mblen without proper checks. A database user can issue crafted queries that trigger a buffer overrun, resulting in out-of-bounds memory access and memory corruption. Successful exploitation can lead to execution of arbitrary code as the operating system user running the PostgreSQL server process. Affected versions are PostgreSQL before 18.2, 17.8, 16.12, 15.16, and 14.21.
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Impact
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Exploits
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No public exploit code observed for this vulnerability.
Affected products & vendors
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Recent activity
28 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A critical memory corruption vulnerability in PostgreSQL's pgcrypto extension affecting symmetric decryption, where malformed UTF-8 can trigger out-of-bounds reads or writes and potentially lead to execution control and system-call triggering.
An arbitrary code execution vulnerability in PostgreSQL caused by missing validation of multibyte character lengths.
A PostgreSQL vulnerability where improper validation of multibyte character length in text manipulation can be exploited by an authenticated database user (low privileges) via crafted queries to trigger a buffer overrun, leading to arbitrary code execution as the OS user running the database.
A buffer overrun/arbitrary code execution vulnerability in PostgreSQL text manipulation caused by missing validation of multibyte character length.
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Every observed campaign linking this CVE to a named adversary.
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Cross-references every affected SKU, including bundled OEM variants.
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