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    10 vulnerabilities by pgbouncer

    CVE-2026-6667 (GCVE-0-2026-6667)

    Vulnerability from cvelistv5 – Published: 2026-05-09 00:43 – Updated: 2026-05-11 14:44
    VLAI
    Title
    PgBouncer missing authorization check in KILL_CLIENT admin command
    Summary
    PgBouncer before 1.25.2 did not perform an appropriate authorization check for the KILL_CLIENT admin command. All users with access to the administration console (which itself requires authorization) could run this command. It would have been correct to allow only users listed in the admin_users parameter.
    Severity
    4.3 (Medium)
    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    Assigner
    References
    Impacted products
    Vendor Product Version
    n/a PgBouncer Affected: 0 , < 1.25.2 (semver)
    Credits
    Thanks to HarutoKimura for finding and reporting this problem.
    Show details on NVD website
    To clipboard 

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    CVE-2026-6666 (GCVE-0-2026-6666)

    Vulnerability from cvelistv5 – Published: 2026-05-09 00:43 – Updated: 2026-05-11 14:44
    VLAI
    Title
    PgBouncer crash in kill_pool_logins_server_error
    Summary
    A possible null pointer reference in PgBouncer before 1.25.2 could lead to a crash, if a server sends an error response without SQLSTATE field.
    Severity
    5.9 (Medium)
    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-476 - NULL Pointer Dereference
    Assigner
    References
    Impacted products
    Vendor Product Version
    n/a PgBouncer Affected: 0 , < 1.25.2 (semver)
    Credits
    Thanks to HarutoKimura for finding and reporting this problem.
    Show details on NVD website
    To clipboard 

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    CVE-2026-6665 (GCVE-0-2026-6665)

    Vulnerability from cvelistv5 – Published: 2026-05-09 00:43 – Updated: 2026-05-12 03:55
    VLAI
    Title
    PgBouncer buffer overflow in SCRAM
    Summary
    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.
    Severity
    8.1 (High)
    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-121 - Stack-based Buffer Overflow
    Assigner
    References
    Impacted products
    Vendor Product Version
    n/a PgBouncer Affected: 0 , < 1.25.2 (semver)
    Credits
    Thanks to HarutoKimura for finding and reporting this problem.
    Show details on NVD website
    To clipboard 

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    CVE-2026-6664 (GCVE-0-2026-6664)

    Vulnerability from cvelistv5 – Published: 2026-05-09 00:43 – Updated: 2026-05-11 14:28
    VLAI
    Title
    PgBouncer integer overflow in PgBouncer network packet parsing
    Summary
    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.
    Severity
    7.5 (High)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-190 - Integer Overflow or Wraparound
    Assigner
    References
    Impacted products
    Vendor Product Version
    n/a PgBouncer Affected: 0 , < 1.25.2 (semver)
    Credits
    Thanks to Johannes Möller for finding and reporting this problem.
    Show details on NVD website
    To clipboard 

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    CVE-2025-12819 (GCVE-0-2025-12819)

    Vulnerability from cvelistv5 – Published: 2025-12-03 19:00 – Updated: 2025-12-27 16:04
    VLAI
    Title
    Untrusted search path in auth_query connection in PgBouncer
    Summary
    Untrusted search path in auth_query connection handler in PgBouncer before 1.25.1 allows an unauthenticated attacker to execute arbitrary SQL during authentication via a malicious search_path parameter in the StartupMessage.
    Severity
    7.5 (High)
    CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator (v2.0.3)
    CWE
    Assigner
    References
    Impacted products
    Vendor Product Version
    n/a PgBouncer Affected: 0 , < 1.25.1 (semver)
    Credits
    Thanks to Jason Tsang of Snowflake Inc. for finding this issue.
    Show details on NVD website
    To clipboard 

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    CVE-2025-2291 (GCVE-0-2025-2291)

    Vulnerability from cvelistv5 – Published: 2025-04-16 18:00 – Updated: 2025-11-03 19:42
    VLAI
    Title
    PgBouncer default auth_query does not take Postgres password expiry into account
    Summary
    Password can be used past expiry in PgBouncer due to auth_query not taking into account Postgres its VALID UNTIL value, which allows an attacker to log in with an already expired password
    Severity
    8.1 (High)
    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-324 - Use of a Key Past its Expiration Date
    Assigner
    References
    Impacted products
    Vendor Product Version
    n/a PgBouncer Affected: 0 , < 1.24.1 (semver)
    Show details on NVD website
    To clipboard 

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    CVE-2021-3672 (GCVE-0-2021-3672)

    Vulnerability from cvelistv5 – Published: 2021-11-23 00:00 – Updated: 2024-10-15 17:14
    VLAI
    Summary
    A flaw was found in c-ares library, where a missing input validation check of host names returned by DNS (Domain Name Servers) can lead to output of wrong hostnames which might potentially lead to Domain Hijacking. The highest threat from this vulnerability is to confidentiality and integrity as well as system availability.
    Severity
    No CVSS data available.
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    Assigner
    References
    Impacted products
    Vendor Product Version
    n/a c-ares Affected: c-ares 1.17.2
    Show details on NVD website
    To clipboard 

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    CVE-2021-3935 (GCVE-0-2021-3935)

    Vulnerability from cvelistv5 – Published: 2021-11-22 15:59 – Updated: 2025-11-03 19:26
    VLAI
    Summary
    When PgBouncer is configured to use "cert" authentication, a man-in-the-middle attacker can inject arbitrary SQL queries when a connection is first established, despite the use of TLS certificate verification and encryption. This flaw affects PgBouncer versions prior to 1.16.1.
    Severity
    No CVSS data available.
    CWE
    Assigner
    References
    Impacted products
    Vendor Product Version
    n/a pgbouncer Affected: PgBouncer 1.16.1
    Show details on NVD website
    To clipboard 

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    CVE-2015-4054 (GCVE-0-2015-4054)

    Vulnerability from cvelistv5 – Published: 2017-05-23 03:56 – Updated: 2024-08-06 06:04
    VLAI
    Summary
    PgBouncer before 1.5.5 allows remote attackers to cause a denial of service (NULL pointer dereference and crash) by sending a password packet before a startup packet.
    Severity
    No CVSS data available.
    CWE
    • n/a
    Assigner
    References
    Date Public
    2015-04-09 00:00
    Show details on NVD website
    To clipboard 

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    CVE-2015-6817 (GCVE-0-2015-6817)

    Vulnerability from cvelistv5 – Published: 2017-05-23 03:56 – Updated: 2024-08-06 07:29
    VLAI
    Summary
    PgBouncer 1.6.x before 1.6.1, when configured with auth_user, allows remote attackers to gain login access as auth_user via an unknown username.
    Severity
    No CVSS data available.
    CWE
    • n/a
    Assigner
    References
    Date Public
    2015-08-27 00:00
    Show details on NVD website
    To clipboard 

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