CVE-2026-42198
Estado: ModificadaAlta (7.5)—
pgjdbc is an open source postgresql JDBC Driver. From version 42.2.0 to before version 42.7.11, pgjdbc is vulnerable to a client-side denial of service during SCRAM-SHA-256 authentication. A malicious server can instruct the driver to perform SCRAM authentication with a very large iteration count. With a large enough value, the client spends an unbounded amount of CPU time inside PBKDF2 before authentication can fail. A single attempt ties up a CPU core. Repeated or concurrent attempts exhaust client CPU and can wedge connection pools.
Leer descripción completaMostrar menos
In affected versions, loginTimeout did not fully mitigate this problem. When loginTimeout expired, the caller could stop waiting, but the worker thread performing the connection attempt could continue running and burning CPU inside the SCRAM PBKDF2 computation. This issue has been patched in version 42.7.11.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 7.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 4.12%
- Percentil entre todas las CVEs puntuadas: 90
- Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
🎯 Técnicas ATT&CK
Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.
- Explotación
T1190Exploit Public-Facing Applicationinitial access75 % - Impacto principal
T1499.004Application or System Exploitationimpact85 %
AV:N/PR:N/UI:N permite explotación remota sin privilegios. El servidor malicioso fuerza iteraciones PBKDF2 costosas causando agotamiento de CPU en el cliente (T1499.004: resource exhaustion).
Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.
🛡️ Mitigaciones ATT&CK que cubren estas técnicas
Tecnologías afectadas (1)
CWE
- CWE-770
- CWE-770
Referencias
- https://github.com/pgjdbc/pgjdbc/releases/tag/REL42.7.11
- https://github.com/pgjdbc/pgjdbc/security/advisories/GHSA-98qh-xjc8-98pq
- https://access.redhat.com/errata/RHSA-2026:19098
- https://access.redhat.com/errata/RHSA-2026:22304
- https://access.redhat.com/errata/RHSA-2026:24348
- https://access.redhat.com/errata/RHSA-2026:25030
- https://access.redhat.com/errata/RHSA-2026:52928
- https://access.redhat.com/errata/RHSA-2026:52929
- https://access.redhat.com/errata/RHSA-2026:52930
- https://access.redhat.com/errata/RHSA-2026:52978
- https://access.redhat.com/errata/RHSA-2026:54532
- https://access.redhat.com/errata/RHSA-2026:59277
- https://access.redhat.com/errata/RHSA-2026:59278
- https://access.redhat.com/errata/RHSA-2026:66488
- https://access.redhat.com/errata/RHSA-2026:66545
- https://access.redhat.com/security/cve/CVE-2026-42198
- https://bugzilla.redhat.com/show_bug.cgi?id=2463857
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42198.json
JSON original (NVD)
Mostrar
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