EUVD-2026-49935
GHSA-jhwv-w4qj-9cmf
Severity by source
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Primary rating from Vendor (EDB) · only source for this CVE.
CVSS VectorVendor: EDB
Lifecycle Timeline
2DescriptionCVE.org
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.
AnalysisAI
Out-of-bounds read in pglogical's apply worker allows a malicious publisher to disclose adjacent process memory or crash the subscriber. The vulnerability affects pglogical subscribers where a subscription is directed to an attacker-controlled endpoint. In default PostgreSQL installations creating a subscription requires superuser privileges, but in managed deployments where subscription creation has been delegated to non‑superuser roles lower‑privileged attackers can exploit this.
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External POC / Exploit Code
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