CVE-2026-107348
Integer overflow in the message buffer growth logic (mbuf_make_room) in PgBouncer 1.21.0 through 1.26.0 allows a remote attacker to cause a
CVSS
5.9
Medio
EPSS
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Exploit Today
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0-100
Publicado: 14 oct 2026 · Última mod.: 14 oct 2026 · CWE-190 · CWE-835
Sin historial EPSS suficiente todavía.
Integer overflow in the message buffer growth logic (mbuf_make_room) in PgBouncer 1.21.0 through 1.26.0 allows a remote attacker to cause a denial of service when max_packet_size is configured above 2147483648. A packet header declaring a length above 2^31 makes the buffer size computation overflow, leaving the growth loop unable to terminate. Because PgBouncer serves all clients from a single process, this saturates a CPU core and stalls every pooled connection until the process is restarted. Since 1.23.0 the overflow is reachable before authentication with a five-byte packet header.
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CVE-2026-1108366.5 MED—
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