First Published: 2026/07/28
Last Updated: 2026/07/28
Summary
pglogical's apply worker does not sufficiently validate the length of certain fields in incoming replication protocol messages before copying them, resulting in an out-of-bounds read. A party acting as the publisher for a subscription, for example a non-PostgreSQL endpoint that speaks the pglogical replication protocol, can return crafted messages that cause the subscriber's apply worker to read beyond the bounds of an allocated buffer, disclosing adjacent process memory or crashing the worker.
To exploit the issue an attacker must be able to direct a subscription at an endpoint they control. In default installations this requires privileges normally reserved for a superuser, so the issue is most relevant to managed deployments where the ability to create subscriptions has been delegated to non-superuser roles.
Vulnerability details
CVE-ID: CVE-2026-50735
CVSS Base Score: 6.1
CVSS Temporal Score: Undefined
CVSS Environmental Score: Undefined
CVSS Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N
Affected products and versions
- Affected Product: pglogical
- Affected Versions: All versions of pglogical 2.x prior to 2.4.8
Remediation/fixes
Impacted users must upgrade to a fixed version of pglogical. A fix will be made available in the next release of pglogical 2.
| Product | VRMF | Remediation/First Fix |
|---|---|---|
| pglogical | All 2.x versions prior to 2.4.8 | Update to latest supported version (at least 2.4.8) |
References
Related information
Acknowledgement
Source: Reported to EDB by Mehmet Ince (@mdisec) through the EDB Vulnerability Disclosure Program.
Change history
- 2026/07/28: Original Copy Published
Disclaimer
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