Quick answers
- Is CVE-2025-12767 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2025-12767 being exploited in the wild.
- How severe is CVE-2025-12767?
- Medium severity, with a CVSS score of 5.3, published 22 September 2026.
- Which products and versions are affected?
- IBM Concert 1.0.0 through 3.0.0.
- Is there a fix for CVE-2025-12767?
- 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-2025-12767 attacked?
- It is attacked over the network.
- Am I affected by CVE-2025-12767?
- Check whether you run IBM Concert 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
The vulnerability is a regular expression denial of service (ReDoS) flaw affecting IBM Concert versions 1.0.0 through 3.0.0. An unauthenticated remote attacker can craft a malicious regular expression that triggers catastrophic backtracking, causing excessive CPU and memory consumption. The attack requires network access but no special privileges or user interaction.
Affected products
- IBM Concert 1.0.0 through 3.0.0
Timeline
- 2026-09-22: disclosed