CVE-2026-16241
PostgreSQL ECPG integer underflow can crash the client
CVSS Score
3.8
EPSS Score
0.0%
EPSS Percentile
0th
Integer underflow in PostgreSQL ECPG allows a database server administrator to achieve temporary denial of service against the ECPG client via sending a bytea value lacking the mandatory prefix. The client overwrites a huge memory region with bytes outside attacker knowledge or control. This typically yields a simple SIGSEGV, but rare cases might achieve client-specific integrity impact via the write. Versions before PostgreSQL 18.5, 17.11, 16.15, 15.19, and 14.24 are affected.
| CWE | CWE-191 |
| Vendor | n/a |
| Product | postgresql |
| Ecosystems | |
| Industries | Technology |
| Published | Aug 13, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:L Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
n/a / PostgreSQL
18 < 18.5 17 < 17.11 16 < 16.15 15 < 15.19 0 < 14.24
References
Credits
The PostgreSQL project thanks ylwangtju for reporting this problem.