Is CVE-2026-118488 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-118488 being exploited in the wild.

How severe is CVE-2026-118488?

Medium severity, with a CVSS score of 5.9, published 3 November 2026.

Which products and versions are affected?

Eclipse Vert.x Redis client [4.0.0, 4.5.35] or [5.0.0, 5.2.2].

Is there a fix for CVE-2026-118488?

Yes: fixed in 5.2.3, 4.5.36. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-118488 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-118488?

Check whether you run Eclipse Vert.x Redis client at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-118488: Eclipse Vert.x Redis client unbounded buffer allocation

CVE-2026-118488 · Severity: medium · CVSS 5.9 · Published 2026-11-03

Eclipse Vert.x Redis client is a library that enables applications to communicate with Redis databases. A malicious Redis server can send specially crafted responses that cause the client to allocate unbounded amounts of memory, either by growing a buffer indefinitely or entering an infinite parsing loop. This can exhaust available heap memory and crash the application.

Vendors: Eclipse.

Quick answers

Is CVE-2026-118488 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-118488 being exploited in the wild.
How severe is CVE-2026-118488?: Medium severity, with a CVSS score of 5.9, published 3 November 2026.
Which products and versions are affected?: Eclipse Vert.x Redis client [4.0.0, 4.5.35] or [5.0.0, 5.2.2].
Is there a fix for CVE-2026-118488?: Yes: fixed in 5.2.3, 4.5.36. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-118488 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-118488?: Check whether you run Eclipse Vert.x Redis client at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Fixed in: 5.2.3, 4.5.36

Technical details

The vulnerability exists in the RESP protocol parser used by the Redis client. Two attack vectors are possible: (1) sending bytes on an EOL-terminated line without proper length-prefixing, causing unbounded buffer growth, and (2) sending a malformed bulk string with missing CRLF trailer, triggering an infinite parser loop that repeatedly emits the same response. Both conditions lead to out-of-memory exhaustion when the consumer buffers responses.

Affected products

Eclipse Vert.x Redis client [4.0.0, 4.5.35] or [5.0.0, 5.2.2]

Timeline

2026-11-03: disclosed

References

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