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