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CVE-2026-25290 is a denial-of-service vulnerability in PHP’s pdo_pgsql driver. The flaw is reachable when an application explicitly enables emulated prepared statements and passes a query parameter containing a byte sequence that is invalid for the active PostgreSQL connection character encoding. In this condition, PostgreSQL’s client library may fail silently and return a NULL escaped string rather than a valid escaped value. PDO’s query handling logic then attempts to read the length of that NULL value, resulting in a null-pointer dereference and an immediate crash of the PHP process. The issue affects the interaction between PDO’s emulated prepare path and libpq error handling for malformed multibyte input.
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No public exploit code observed for this vulnerability.
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2 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
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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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