Missing validation of a mandatory attribute in the SCRAM client-final-message parser in PgBouncer through 1.25.2 allows an unauthenticated remote attacker to crash the process. A malformed message can make the parser report success while leaving a required value unset, which is then dereferenced as a NULL pointer. The crash occurs before any credential is verified, so no valid account is required. Because PgBouncer serves all clients from a single process, this terminates every pooled connection.

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.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - Missing validation of a mandatory attribute in the SCRAM client-final-message parser in PgBouncer through
    1.25.2 allows an unauthenticated remote attacker to crash the process. A malformed message can make the
    parser report success while leaving a required value unset, which is then dereferenced as a NULL pointer.
    The crash occurs before any credential is verified, so no valid account is required. Because PgBouncer
    serves all clients from a single process, this terminates every pooled connection. (CVE-2026-19888)

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

  - Missing validation of a mandatory attribute in the SCRAM client-final-message parser in PgBouncer through     1.25.2 allows an unauthenticated remote attacker to crash the process. A malformed message can make the     parser report success while leaving a required value unset, which is then dereferenced as a NULL pointer.
    The crash occurs before any credential is verified, so no valid account is required. Because PgBouncer     serves all clients from a single process, this terminates every pooled connection. (CVE-2026-19888)

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
455317	Echo: pgbouncer: security update to 1.26.0-1	Tenable Cloud Security	Echo Local Security Checks	Local	high
455317	Echo: pgbouncer: security update to 1.26.0-1	Tenable Self-Hosted Container Security	Echo Local Security Checks	Local	high
350270	Linux Distros Unpatched Vulnerability : CVE-2026-19888	Nessus	Misc.	Local	high

Detections

Analytics

CVE-2026-19888

high

Tenable Plugins

critical

critical

critical

high

high

high