CVE-2026-102664 (GCVE-0-2026-102664)

Vulnerability from cvelistv5 – Published: 2026-11-04 20:42 – Updated: 2026-11-09 16:58
VLAI
Title
ProxySQL: Uninitialized heap read in MySQL compressed packet decompression via zlib path
Summary
ProxySQL is a proxy for MySQL and its forks, as well as PostgreSQL. Prior to 3.0.10, 3.1.10, and 4.0.10, decompress_mysql_payload() in lib/mysql_data_stream.cpp accepts a zlib stream when uncompress() returns Z_OK without checking that the actual output length equals the attacker-controlled payload_length. An authenticated MySQL client that negotiates compression can overstate payload_length, causing buffer2array() to parse the uninitialized tail of a heap buffer as MySQL packet headers and forward stale data to the backend. Backend error responses can disclose prior SQL queries, result data, credentials, or session state, and malformed lengths can also cause excessive allocations. This issue is fixed in versions 3.0.10, 3.1.10, and 4.0.10.
Severity
7.1 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-09 16:09 UTC
CWE
  • CWE-908 - Use of Uninitialized Resource
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7817 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
sysown proxysql Affected: < 3.0.10
Affected: >= 3.1.0, < 3.1.10
Affected: >= 4.0.0, < 4.0.10
guessed Create a notification for this product.
Show details on NVD website
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