CVE-2026-6665— PgBouncer buffer overflow in SCRAM
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I. Basic Information for CVE-2026-6665
Vulnerability Information
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Vulnerability Title
PgBouncer buffer overflow in SCRAM
Source: NVD (National Vulnerability Database)
Vulnerability Description
The SCRAM code in PgBouncer before 1.25.2 did not check the return value of strlcat() correctly when building the contents of the SCRAM client-final-message. A malicious backend that sends a SCRAM server-final-message with a long nonce can trigger a stack overflow.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
栈缓冲区溢出
Source: NVD (National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| - | PgBouncer | 0 ~ 1.25.2 | - |
II. Public POCs for CVE-2026-6665
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · n/a · 2026-05-09 · 10 CVEs total
| CVE-2026-6664 | 7.5 HIGH | PgBouncer integer overflow in PgBouncer network packet parsing |
| CVE-2026-8193 | 6.3 MEDIUM | Akaunting Invoice PDF Rendering dompdf.php server-side request forgery |
| CVE-2026-6666 | 5.9 MEDIUM | PgBouncer crash in kill_pool_logins_server_error |
| CVE-2026-8186 | 5.3 MEDIUM | Open5GS NF client.c ogs_sbi_client_send_via_scp_or_sepp out-of-bounds |
| CVE-2026-8187 | 5.3 MEDIUM | Open5GS UPF gtp-path.c _gtpv1_u_recv_cb resource consumption |
| CVE-2026-8195 | 4.3 MEDIUM | JeecgBoot SVG File CommonController.java cross site scripting |
| CVE-2026-8194 | 4.3 MEDIUM | osTicket Dispatcher class.dispatcher.php cross-site request forgery |
| CVE-2026-6667 | 4.3 MEDIUM | PgBouncer missing authorization check in KILL_CLIENT admin command |
| CVE-2026-8196 | 3.7 LOW | JeecgBoot mLogin Endpoint LoginController.java authorization |
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-2026-6664
PgBouncer integer overflow in PgBouncer network packet parsi - 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-2026-8276
bettercap MySQL Server mysql_server.go integer coercion - CVE-2026-8275
bettercap zerogod IPP Service zerogod_ipp_primitives.go ippR - CVE-2026-8270
Open5GS SMF ogs_nas_parse_qos_rules denial of service - CVE-2026-8269
Open5GS SMF smf_nsmf_handle_create_sm_context denial of serv - CVE-2026-8268
Open5GS SMF OpenAPI_list_create denial of service
Same weakness: CWE-121
- CVE-2026-8258
Squirrel sqstdstring.cpp validate_format stack-based overflo - CVE-2026-8234
EFM ipTIME A8004T WifiBasicSet formWifiBasicSet stack-based - CVE-2026-41509
Integer underflow in crypto_sign_open() leads to buffer over - CVE-2026-8138
Tenda CX12L SetPptpServerCfg” formSetPPTPServer stack-based - CVE-2026-41286
Stack-based Buffer Overflow in WatchGuard Agent Discovery Se
V. Comments for CVE-2026-6665
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