CVE-2026-107349
High
Description
An infinite loop in PgBouncer 1.20.0 through 1.26.0 allows an unauthenticated remote attacker to cause a denial of service. A StartupMessage whose options parameter contains an empty parameter name, such as "-c=", makes the ignore_startup_parameters list lookup loop forever. Because PgBouncer serves all clients from a single process, this saturates a CPU core and makes PgBouncer unresponsive to all clients until the process is restarted.
SeverityHigh
CVSS7.5
Exploit probability—
ProductPgBouncer
PublishedOct 14, 2026
First seenOct 14, 2026
How to fix
Update
- PgBouncer1.26.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| PgBouncer | 1.20.0 ≤ v < 1.26.1 | 1.26.1 |
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