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.

The remote Fedora 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-99030761e8 advisory.

    Update to 1.26.0.

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 45 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-851c3ccde8 advisory.

    Update to 1.26.0.

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-6197f5c17e advisory.

    Update to 1.26.0.

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2026-6664)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
362934	Fedora 44 : pgbouncer (2026-99030761e8)	Nessus	Fedora Local Security Checks	Local	critical
362933	Fedora 45 : pgbouncer (2026-851c3ccde8)	Nessus	Fedora Local Security Checks	Local	critical
362927	Fedora 43 : pgbouncer (2026-6197f5c17e)	Nessus	Fedora Local Security Checks	Local	critical
313599	Linux Distros Unpatched Vulnerability : CVE-2026-6664	Nessus	Misc.	Local	high

Detections

Analytics

CVE-2026-6664

high

Tenable Plugins

critical

critical

critical

high