Quick answers
- Is CVE-2026-72756 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-72756 being exploited in the wild.
- How severe is CVE-2026-72756?
- High severity, with a CVSS score of 7.5, published 26 October 2026.
- Which products and versions are affected?
- NLnet Labs Routinator up to and including 0.15.2.
- Is there a fix for CVE-2026-72756?
- Yes: fixed in Routinator 0.15.3. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-72756 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-72756?
- Check whether you run NLnet Labs Routinator 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: Routinator 0.15.3
Technical details
The vulnerability is a denial of service in Routinator's rsync URI handling: when processing an rsync reference obtained over RRDP, if the file path cannot be stored on the local filesystem (due to path length limits, name collisions, or similar filesystem constraints), the application exits instead of gracefully handling the error. An attacker can inject a malformed rsync URI into RRDP responses to trigger a crash; this requires the ability to influence RRDP data, such as via a compromised RRDP server or man-in-the-middle attack on unencrypted connections.
Affected products
- NLnet Labs Routinator up to and including 0.15.2
Timeline
- 2026-10-26: disclosed
- 2026-10-26: advisory