# CVE-2026-22591: eProsima Fast DDS stack exhaustion in DDSSQLFilter parser

Source: https://junglewise.ai/threats/cve-2026-22591-eprosima-fast-dds-stack-exhaustion-in-ddssqlfilter-parser  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-09. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-22591 · Severity: high · CVSS 7.5 · Published 2026-09-09

Fast DDS is a widely-used open-source implementation of the DDS (Data Distribution Service) messaging standard used in robotics, autonomous systems, and real-time distributed applications. An attacker who can join a DDS domain can send a specially crafted network message containing a deeply nested filter expression that causes the DDS participant's process to crash due to stack exhaustion. This is a network-based denial-of-service attack requiring only network connectivity to the DDS domain.

Technologies: [Eprosima Fast Dds](https://junglewise.ai/threats/technologies/fast-dds). Vendors: [Eprosima](https://junglewise.ai/threats/vendors/eprosima).

## Quick answers

**Is CVE-2026-22591 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-22591 being exploited in the wild.

**How severe is CVE-2026-22591?** High severity, with a CVSS score of 7.5, published 9 September 2026.

**Which products and versions are affected?** Eprosima Fast Dds prior to 2.6.12, 2.14.6, 3.2.4, and 3.4.3.

**Is there a fix for CVE-2026-22591?** A patch was published on 2026-07-23. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-22591 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-22591?** Check whether you run Eprosima Fast Dds 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.

## Technical details

Fast DDS's DDSSQLFilter component implements SQL-based content filtering using a fully recursive PEG (Parsing Expression Grammar) parser without recursion depth limits, AST depth limits, or practical length limits on filter expressions. When a DDS participant receives a malicious SEDP (RTPS discovery) DCPSSubscription DATA message containing a deeply nested filterExpression (e.g., tens of thousands of nested parentheses), the recursive parser exhausts the thread stack and crashes the process. The attack requires network reachability to the victim's RTPS ports (default multicast 239.255.0.1:7400/7412 or configured unicast) and the attacker must be able to join the DDS domain; with security disabled, any reachable process can join; with security enabled, any authenticated participant can send malicious discovery messages. Patched versions 2.6.12, 2.14.6, 3.2.4, and 3.4.3 address the issue, likely by adding recursion depth limits to the parser.

## Affected products

- eProsima Fast DDS prior to 2.6.12, 2.14.6, 3.2.4, and 3.4.3

## Timeline

- 2026-07-23: disclosed
- 2026-07-23: patched

## References

- [https://github.com/eProsima/Fast-DDS/security/advisories/GHSA-7577-rf2r-j88m](https://github.com/eProsima/Fast-DDS/security/advisories/GHSA-7577-rf2r-j88m)

## Related threats

- [eprosima Fast DDS out-of-bounds read in DATA_FRAG processing](https://junglewise.ai/threats/cve-2026-22590-eprosima-fast-dds-out-of-bounds-read-in-data-frag-processing)
- [eProsima Fast-DDS improper certificate revocation validation](https://junglewise.ai/threats/cve-2025-67108-eprosima-fast-dds-improper-certificate-revocation-validation)
- [eProsima Fast-DDS integer overflow in DataFrag sub-message processing](https://junglewise.ai/threats/cve-2025-65865-eprosima-fast-dds-integer-overflow-in-datafrag-sub-message)
- [eProsima Fast-DDS v3.3 and before has an infinite loop vulnerability caused by integer overflow in the Time_t:: fraction() function.](https://junglewise.ai/threats/cve-2025-63829-eprosima-fast-dds-v3-3-and-before-has-an-infinite-loop)