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CVE-2026-25290 is a denial-of-service vulnerability in PHP's PDO PostgreSQL driver (pdo_pgsql). When emulated prepared statements are explicitly enabled, a query parameter containing a byte sequence invalid for the active PostgreSQL connection encoding can cause libpq to return a NULL escaped-string value. PDO subsequently attempts to obtain the length of that value without first verifying that it is non-NULL, resulting in a NULL pointer dereference and PHP process segmentation fault.
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No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
3 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A memory-corruption vulnerability caused by using addition to validate buffer lengths for large externally sourced data buffers, likely permitting an integer-overflow-related bounds-check bypass.
A moderate-severity denial-of-service vulnerability in PHP's pdo_pgsql driver that can trigger a null pointer dereference and crash the PHP process when emulated prepared statements handle invalid multibyte input.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.