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CVE-2026-16241 is an integer-underflow vulnerability in PostgreSQL's ECPG client library when handling a bytea value that lacks its mandatory prefix. A malicious database server administrator can return such a value to an ECPG client, causing the client to overwrite a very large memory region with data outside the attacker's knowledge or control. PostgreSQL versions before 18.6, 17.11, 16.15, 15.19, and 14.24 are affected.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
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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.
22 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A PostgreSQL vulnerability referenced by the plugin; no technical vulnerability details are provided.
A PostgreSQL ECPG integer-underflow vulnerability that can crash the client.
An ECPG integer-underflow vulnerability that can crash the client.
An ECPG integer-underflow vulnerability that can crash the PostgreSQL client.
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.