# CVE-2026-119542: Infinispan Ickle query parser stack overflow in nested predicates

Source: https://junglewise.ai/threats/cve-2026-119542-a-flaw-was-found-in-the-ickle-query-parser-in-infinispan-a-query  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-30. Updated: 2026-10-30  
License: CC BY 4.0 with a link back

CVE-2026-119542 · Severity: medium · CVSS 4.3 · Published 2026-10-30

Infinispan is an in-memory data store used for caching and real-time analytics. A flaw in its Ickle query parser allows authenticated users to submit queries with deeply nested predicates that trigger a stack overflow, causing the application to crash and become unavailable.

Technologies: [Red Hat Infinispan](https://junglewise.ai/threats/technologies/infinispan). Vendors: [Red Hat](https://junglewise.ai/threats/vendors/red-hat).

## Quick answers

**Is CVE-2026-119542 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-119542 being exploited in the wild.

**How severe is CVE-2026-119542?** Medium severity, with a CVSS score of 4.3, published 30 October 2026.

**Which products and versions are affected?** Red Hat Infinispan.

**Is there a fix for CVE-2026-119542?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-119542 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-119542?** Check whether you run Red Hat Infinispan. 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.

## Technical details

The Ickle query parser in Infinispan uses recursive parsing that can be exhausted by queries containing deeply nested predicates, leading to a StackOverflowError that crashes the thread. An authenticated attacker with BULK_READ permission can craft and submit such a malicious query to trigger a denial of service. The vulnerability requires authentication and specific permissions, limiting exposure.

## Affected products

- Red Hat Infinispan

## Timeline

- 2026-10-30: disclosed

## References

- [https://access.redhat.com/downloads/content/package-browser/](https://access.redhat.com/downloads/content/package-browser/)
- [https://access.redhat.com/jbossnetwork/restricted/listSoftware.html](https://access.redhat.com/jbossnetwork/restricted/listSoftware.html)

## Related threats

- [JBoss Marshalling deserialization RCE in Infinispan session replication](https://junglewise.ai/threats/cve-2026-15555-jboss-marshalling-deserialization-rce-in-infinispan-session)
- [Infinispan REST API memory leak leading to Denial of Service](https://junglewise.ai/threats/cve-2024-6875-infinispan-rest-api-memory-leak-leading-to-denial-of-service)