CVE-2026-14265 RCE via Deserialization in AWS Advanced JDBC Wrapper

High 7.7 Published 1 Jul 2026 Updated 2 Jul 2026

An attacker with write access to the shared cache can execute arbitrary code on application servers by poisoning cached query results with malicious serialized objects.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-14265?

CVE-2026-14265 is a high-severity unsafe deserialization vulnerability in AWS Advanced JDBC Wrapper, published on 1 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Deserialization of untrusted data in the RemoteQueryCachePlugin in Amazon Web Services AWS Advanced JDBC Wrapper 3.3.0 through 4.0.0 might allow an actor with write access to the shared cache infrastructure to execute arbitrary code on application servers that read cached query results via a crafted serialized Java object. The RemoteQueryCachePlugin uses ObjectInputStream without class filtering when deserializing cached query results from Redis or Valkey, enabling gadget chain execution when cache entries are poisoned.

We recommend upgrading to AWS Advanced JDBC Wrapper version 4.0.1 or later.

Weakness: CWE-502

Which versions are affected by CVE-2026-14265?

It affects 1 product.

Products include Amazon Advanced Jdbc Wrapper.

How do I fix CVE-2026-14265?

No fix has been published for CVE-2026-14265 yet. Limit exposure of the affected software until one is available.

Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.

Is CVE-2026-14265 being exploited?

There is no known exploitation of CVE-2026-14265 in the wild and no public exploit code.

CVE-2026-18061 Improper Restriction of XML External Entity References in AWS Advanced JDBC Wrapper RemoteQueryCachePlugin Medium 6.0

Sources

Also known as GHSA-c5q4-97jw-jggh.