Quick answers
- Is CVE-2026-72753 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-72753 being exploited in the wild.
- How severe is CVE-2026-72753?
- High severity, with a CVSS score of 8.2, 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-2026-72753?
- Yes: fixed in Routinator 0.15.3 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-72753 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-72753?
- 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 or later
Technical details
Routinator fails to properly validate RRDP (RPKI Repository Delta Protocol) notification files, accepting delta entries with gaps and processing excessively large numbers of entries without proper bounds checking. An attacker controlling or man-in-the-middle attacking an RRDP repository can send malicious notification files to trigger memory exhaustion or cause incomplete RPKI data to be used for route validation. The vulnerability requires network access to the RRDP server and affects all versions up to 0.15.2.
Affected products
- NLnet Labs Routinator up to and including 0.15.2
Timeline
- 2026-10-26: disclosed