CVE-2026-6664— PgBouncer integer overflow in PgBouncer network packet parsing
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I. Basic Information for CVE-2026-6664
Vulnerability Information
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Vulnerability Title
PgBouncer integer overflow in PgBouncer network packet parsing
Source: NVD (National Vulnerability Database)
Vulnerability Description
An integer overflow in network packet parsing code in PgBouncer before 1.25.2 bypasses a boundary check and can lead to a crash. An unauthenticated remote attacker can crash PgBouncer with a malformed SCRAM authentication packet.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
整数溢出或超界折返
Source: NVD (National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| - | PgBouncer | 0 ~ 1.25.2 | - |
II. Public POCs for CVE-2026-6664
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · n/a · 2026-05-09 · 4 CVEs total
| CVE-2026-6665 | 8.1 HIGH | PgBouncer buffer overflow in SCRAM |
| CVE-2026-6666 | 5.9 MEDIUM | PgBouncer crash in kill_pool_logins_server_error |
| CVE-2026-6667 | 4.3 MEDIUM | PgBouncer missing authorization check in KILL_CLIENT admin command |
IV. Related Vulnerabilities
Same product: PgBouncer
- CVE-2026-6667
PgBouncer missing authorization check in KILL_CLIENT admin c - CVE-2026-6666
PgBouncer crash in kill_pool_logins_server_error - CVE-2026-6665
PgBouncer buffer overflow in SCRAM - CVE-2025-12819
Untrusted search path in auth_query connection in PgBouncer - CVE-2025-2291
PgBouncer default auth_query does not take Postgres password
Same vendor: n/a
- CVE-2026-6667
PgBouncer missing authorization check in KILL_CLIENT admin c - CVE-2026-6666
PgBouncer crash in kill_pool_logins_server_error - CVE-2026-6665
PgBouncer buffer overflow in SCRAM - CVE-2026-8127
eladmin Users API Endpoint UserController.java checkLevel ac - CVE-2026-8124
GPAC box_code_base.c sidx_box_read allocation of resources
Same weakness: CWE-190
- CVE-2026-42311
Pillow: OOB Write with Invalid PSD Tile Extents (Integer Ove - CVE-2026-42308
Pillow: Integer overflow when processing fonts - CVE-2026-42199
Grid: Integer Overflow in Grid::expand_rows Leads to Safe-AP - CVE-2026-42217
OpenEXR: Shift exponent overflow in `readVariableLengthInteg - CVE-2026-41142
OpenEXR is Vulnerable to Integer overflow in ImageChannel::r
V. Comments for CVE-2026-6664
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