CVE Watch16 de out. de 2026

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

Média

EPSS

0.4%

p33

KEV

—

Exploit Today

0-100

Publicado: 14 de out. de 2026 · Última mod.: 16 de out. de 2026 · CWE-190 · CWE-835

EPSS · 30d

0.4%EPSS · 30 dias0.4%

2026-10-152026-11-06

Descrição técnica

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.

Referências oficiais

www.pgbouncer.orghttps://www.pgbouncer.org/changelog.html

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