Vulnerability · Published Jul 28, 2026 · Assigned by EDB
CVE-2026-50738
High 7.7
In plain English
A high-severity use-after-free in pglogical from EnterpriseDB. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 44% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
A use-after-free condition exists in pglogical's worker signaling code, where a worker structure can be dereferenced after the underlying slot has been freed or recycled during normal worker lifecycle events. The condition is reachable during normal replication operation, including by a low-privileged user able to influence worker start, stop, and restart timing through permitted pglogical operations. In the typical case the condition crashes replication workers, causing an availability impact. In the worst case a use-after-free in a PostgreSQL backend can be leveraged as a remote code execution primitive at the privilege of that backend.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | pglogical | no fix listed | DEBIAN-CVE-2026-50738 |
| Debian:13 | pglogical | no fix listed | DEBIAN-CVE-2026-50738 |
| Debian:14 | pglogical | 2.4.8-1 | DEBIAN-CVE-2026-50738 |
| Ubuntu:22.04:LTS | pglogical | no fix listed | UBUNTU-CVE-2026-50738 |
| Ubuntu:24.04:LTS | pglogical | no fix listed | UBUNTU-CVE-2026-50738 |
| Ubuntu:26.04:LTS | pglogical | no fix listed | UBUNTU-CVE-2026-50738 |
| Ubuntu:26.10 | pglogical | no fix listed | UBUNTU-CVE-2026-50738 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| EnterpriseDB | pglogical | 2 – before 2.4.8 |
Weakness: CWE-416 · Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N